Ado.net[登录，增删改查，Get传值,全选，不选，…
2018-06-23 23:33:34来源：未知 阅读 ()
[虽然说，开发的时候，我们可以使用各种框架，ado.net作为底层的东西，作为一个合格的程序员，在出问题的时候我们还是要知道如何调试]
一、增删改查
cmd.ExecuteReader();执行查询,所有sql语句的查询都用这个方法;
cmd.ExecuteNonQuery();执行所有sql语句的增删改都用这个方法;
1 <div> 2 <table> 3 <tr> 4 <td> 用户名:</td> 5 <td> 6 <asp:TextBox ID="txtSUserName" runat="server"></asp:TextBox> 7 </td> 8 <td>班级：</td> 9 <td> 10 <asp:DropDownList ID="ddlselPhase" runat="server"> 11 <asp:ListItem>---请选择---</asp:ListItem> 12 <asp:ListItem>.NET高级班01期</asp:ListItem> 13 <asp:ListItem>.NET高级班02期</asp:ListItem> 14 <asp:ListItem>.NET讲师</asp:ListItem> 15 <asp:ListItem>.NET网站开发01期</asp:ListItem> 16 <asp:ListItem>.NET网站开发02期</asp:ListItem> 17 <asp:ListItem>.NET网站开发03期</asp:ListItem> 18 <asp:ListItem>.NET网站开发04期</asp:ListItem> 19 <asp:ListItem>.NET网站开发05期</asp:ListItem> 20 <asp:ListItem>.NET网站开发06期</asp:ListItem> 21 <asp:ListItem>.NET网站开发07期</asp:ListItem> 22 <asp:ListItem>.NET网站开发08期</asp:ListItem> 23 <asp:ListItem>.NET网站开发09期</asp:ListItem> 24 <asp:ListItem>.NET网站开发10期</asp:ListItem> 25 <asp:ListItem>.NET网站开发11期</asp:ListItem> 26 <asp:ListItem>.NET网站开发12期</asp:ListItem> 27 <asp:ListItem>.NET网站开发13期</asp:ListItem> 28 <asp:ListItem>.NET网站开发14期</asp:ListItem> 29 <asp:ListItem>.NET网站开发15期</asp:ListItem> 30 <asp:ListItem>.NET网站开发16期</asp:ListItem> 31 <asp:ListItem>java第一期</asp:ListItem> 32 <asp:ListItem>JAVA讲师</asp:ListItem> 33 <asp:ListItem>ps设计01期</asp:ListItem> 34 <asp:ListItem>ps设计02期</asp:ListItem> 35 <asp:ListItem>ps设计03期</asp:ListItem> 36 <asp:ListItem>网页前端01期</asp:ListItem> 37 </asp:DropDownList> 38 </td> 39 <td> 40 <asp:Button ID="btnSel" runat="server" Text="查询" OnClick="btnSel_Click" /> 41 </td> 42 </tr> 43 </table> 44 </div> 45 <div> 46 <table> 47 <tr> 48 <td> 用户名:</td> 49 <td> 50 <asp:TextBox ID="txtAddUserName" runat="server"></asp:TextBox> 51 </td> 52 <td> 密码:</td> 53 <td> 54 <asp:TextBox ID="txtAddPwd" runat="server" TextMode="Password"></asp:TextBox> 55 </td> 56 <td> QQ:</td> 57 <td> 58 <asp:TextBox ID="txtAddQq" runat="server"></asp:TextBox> 59 </td> 60 <td>班级：</td> 61 <td> 62 <asp:DropDownList ID="ddlAddPhase" runat="server"> 63 <asp:ListItem>---请选择---</asp:ListItem> 64 <asp:ListItem>.NET高级班01期</asp:ListItem> 65 <asp:ListItem>.NET高级班02期</asp:ListItem> 66 <asp:ListItem>.NET讲师</asp:ListItem> 67 <asp:ListItem>.NET网站开发01期</asp:ListItem> 68 <asp:ListItem>.NET网站开发02期</asp:ListItem> 69 <asp:ListItem>.NET网站开发03期</asp:ListItem> 70 <asp:ListItem>.NET网站开发04期</asp:ListItem> 71 <asp:ListItem>.NET网站开发05期</asp:ListItem> 72 <asp:ListItem>.NET网站开发06期</asp:ListItem> 73 <asp:ListItem>.NET网站开发07期</asp:ListItem> 74 <asp:ListItem>.NET网站开发08期</asp:ListItem> 75 <asp:ListItem>.NET网站开发09期</asp:ListItem> 76 <asp:ListItem>.NET网站开发10期</asp:ListItem> 77 <asp:ListItem>.NET网站开发11期</asp:ListItem> 78 <asp:ListItem>.NET网站开发12期</asp:ListItem> 79 <asp:ListItem>.NET网站开发13期</asp:ListItem> 80 <asp:ListItem>.NET网站开发14期</asp:ListItem> 81 <asp:ListItem>.NET网站开发15期</asp:ListItem> 82 <asp:ListItem>.NET网站开发16期</asp:ListItem> 83 <asp:ListItem>java第一期</asp:ListItem> 84 <asp:ListItem>JAVA讲师</asp:ListItem> 85 <asp:ListItem>ps设计01期</asp:ListItem> 86 <asp:ListItem>ps设计02期</asp:ListItem> 87 <asp:ListItem>ps设计03期</asp:ListItem> 88 <asp:ListItem>网页前端01期</asp:ListItem> 89 </asp:DropDownList> 90 </td> 91 <td> 92 <asp:Button ID="btnAdd" runat="server" Text="添加" OnClick="btnAdd_Click" style="height: 21px" /> 93 </td> 94 </tr> 95 </table> 96 </div> 97 <div> 98 <table> 99 <tr> 100 <td>用户ID:</td> 101 <td> 102 <asp:TextBox ID="txtDUId" runat="server"></asp:TextBox> 103 </td> 104 <td> 105 <asp:Button ID="btnD" runat="server" Text="删除" OnClick="btnD_Click" /> 106 </td> 107 </tr> 108 </table> 109 </div>
110 <div> 111 <table> 112 <tr> 113 <td>ID:</td> 114 <td> 115 <asp:TextBox ID="txtUId" runat="server"></asp:TextBox> 116 </td> 117 <td> 118 <asp:TextBox ID="txtUUserName" runat="server"></asp:TextBox> 119 </td> 120 <td> 121 <asp:Button ID="btnU" runat="server" Text="更新" OnClick="btnU_Click" /> 122 </td> 123 </tr> 124 </table> 125 </div> 126 <div> 127 <asp:GridView ID="GriVShow" runat="server" AutoGenerateColumns="False"> 128 <Columns> 129 <asp:BoundField DataField="Userid" HeaderText="用户ID" /> 130 <asp:BoundField DataField="UserName" HeaderText="用户名：" /> 131 <asp:BoundField DataField="phonenum" HeaderText="电话号码" /> 132 <asp:BoundField DataField="sex" HeaderText="性别" /> 133 <asp:BoundField DataField="phase" HeaderText="班级" /> 134 <asp:BoundField DataField="qq" HeaderText="QQ" /> 135 <asp:BoundField DataField="Message" HeaderText="信息" /> 136 <asp:BoundField DataField="HeadPic" HeaderText="头像" /> 137 <asp:BoundField DataField="CreatedTime" HeaderText="创建时间" /> 138 <asp:TemplateField HeaderText="详情"> 139 <ItemTemplate> 140 <a href="UserInforManagerContext.aspx?Id=<%#Eval("UserId")%>">详情</a> 141 </ItemTemplate> 142 </asp:TemplateField> 143 </Columns> 144 </asp:GridView> 145 </div>
1 public partial class UserInforManager : System.Web.UI.Page 2 { 3 string constr = ConfigurationManager.ConnectionStrings["sq_r"].ToString(); 4 SqlConnection con = null; 5 SqlCommand cmd = null; 6 SqlDataReader read = null; 7 protected void Page_Load(object sender, EventArgs e) 8 { 9 if (!(IsPostBack)) 10 { 11 BindUserInfor(); 12 } 13 } 14 /// <summary> 15 /// 数据绑定 16 /// </summary> 17 public void BindUserInfor() 18 { 19 try 20 { 21 //string strstring = "select Userid,UserName,phonenum,sex,phase,qq,Message,HeadPic,CreatedTime from UserInfor where 1=1"; 22 using (con = new SqlConnection(constr)) 23 { 24 con.Open(); 25 cmd = new SqlCommand(GetSql(), con); 26 using (read = cmd.ExecuteReader()) 27 { 28 //开始读以上sql数据,这句话一定要有，如果把它取出来的话是需要读的，但是这地方我只想它把内容赋值给gridview 29 //if (read.Read()) 30 //{ 31 //} 32 //但是这地方我只想它把内容赋值给gridview 33 //内容取出来之后，我希望有东西可以接收它的内容 34 GriVShow.DataSource = read; 35 GriVShow.DataBind(); 36 } 37 } 38 } 39 catch (Exception ex) 40 { 41 Response.Write("<script>alret('系统正在维护，请联系管理员!');</script>"); 42 } 43 } 44 45 protected void btnSel_Click(object sender, EventArgs e) 46 { 47 BindUserInfor(); 48 } 49 /// <summary> 50 /// 获取SQL 51 /// </summary> 52 /// <returns></returns> 53 public string GetSql() 54 { 55 //string username = txtSUserName.Text.Trim(); 56 //string phase = ddlselPhase.SelectedValue; 57 StringBuilder sb = new StringBuilder(); 58 sb.Append("select Userid,UserName,phonenum,sex,phase,qq,Message,HeadPic,CreatedTime from UserInfor where 1=1"); 59 if (!string.IsNullOrEmpty(txtSUserName.Text.Trim())) 60 { 61 sb.Append(string.Format("and UserName='{0}'", txtSUserName.Text.Trim())); 62 } 63 if (ddlselPhase.SelectedIndex > 0) 64 { 65 sb.Append(string.Format("and phase='{0}'", ddlselPhase.SelectedValue)); 66 } 67 return sb.ToString(); 68 } 69 70 protected void btnAdd_Click(object sender, EventArgs e) 71 { 72 try 73 { 74 string addUserName = txtAddUserName.Text.Trim(); 75 string addPwd = txtAddPwd.Text.Trim(); 76 string addqq = txtAddQq.Text.Trim(); 77 string addPhase = ddlAddPhase.SelectedIndex > 0 ? ddlAddPhase.SelectedValue : ""; 78 if (!string.IsNullOrEmpty(addUserName)) 79 { 80 using (con = new SqlConnection(constr)) 81 { 82 con.Open(); 83 string sstring1 = string.Format("insert into UserInfor(UserName,Pwd,QQ,Phase)values('{0}','{1}','{2}','{3}')", addUserName, addPwd, addqq, addPhase); 84 cmd = new SqlCommand(sstring1, con); 85 if (cmd.ExecuteNonQuery() > 0) 86 { 87 Response.Write("<script>alert('插入成功！');</script>"); 88 } 89 BindUserInfor(); 90 } 91 } 92 else 93 { 94 Response.Write("<script>alert('请输入内容');</script>"); 95 } 96 } 97 catch (Exception) 98 { 99 Response.Write("网页正在维护！"); 100 } 101 } 102 103 protected void btnD_Click(object sender, EventArgs e) 104 { 105 int UserId = txtDUId.Text.Trim() == "" ? 0 : Convert.ToInt32(txtDUId.Text.Trim()); 106 try 107 { 108 using (con = new SqlConnection(constr)) 109 { 110 con.Open(); 111 string ssql = string.Format("select UserId from UserInfor where UserId='{0}'", UserId); 112 cmd = new SqlCommand(ssql, con); 113 read = cmd.ExecuteReader(); 114 if (read.HasRows) 115 { 116 read.Dispose(); 117 read.Close(); 118 string sstring1 = string.Format("delete UserInfor where UserId='{0}'", UserId); 119 cmd = new SqlCommand(sstring1, con); 120 if (cmd.ExecuteNonQuery() > 0) 121 { 122 Response.Write("<script>alert('删除成功！');</script>"); 123 } 124 BindUserInfor(); 125 } 126 else 127 { 128 Response.Write("该用户不存在！"); 129 } 130 } 131 } 132 catch (Exception ex) 133 { 134 Response.Write("<script>alret('系统正在维护，请联系管理员!');</script>"); 135 } 136 } 137 138 protected void btnU_Click(object sender, EventArgs e) 139 { 140 int uId = txtUId.Text.Trim()==""?0:Convert.ToInt32(txtUId.Text.Trim()); 141 string uUserName = txtUUserName.Text.Trim(); 142 try 143 { 144 using (con = new SqlConnection(constr)) 145 { 146 con.Open(); 147 string ssql = string.Format("select UserId from UserInfor where UserId='{0}'", uId); 148 cmd = new SqlCommand(ssql, con); 149 read = cmd.ExecuteReader(); 150 if (read.HasRows) 151 { 152 read.Dispose(); 153 read.Close(); 154 string ssql1 = string.Format("update UserInfor set UserName='{0}' where UserId='{1}'", uUserName, uId); 155 cmd = new SqlCommand(ssql1, con); 156 if (cmd.ExecuteNonQuery() > 0) 157 { 158 Response.Write("更新成功！"); 159 } 160 BindUserInfor(); 161 } 162 else 163 { 164 Response.Write("该用户不存在！"); 165 } 166 } 167 } 168 catch (Exception) 169 { 170 Response.Write("<script>alret('系统正在维护，请联系管理员!');</script>"); 171 } 172 } 173 }
另一种更新的方法，调用cmd的ExecuteScalar()执行查询，记录数，返回0或1，返回是object类型
1 <div> 2 <table> 3 <tr> 4 <td>ID:</td> 5 <td> 6 <asp:TextBox ID="txtUuid" runat="server"></asp:TextBox> 7 </td> 8 <td> 9 <asp:TextBox ID="txtUuserName2" runat="server"></asp:TextBox> 10 </td> 11 <td> 12 <asp:Button ID="btnU2" runat="server" Text="更新" OnClick="btnU2_Click"/> 13 </td> 14 </tr> 15 </table> 16 </div>
1 protected void btnU2_Click(object sender, EventArgs e) 2 { 3 int Uid2 = txtUuid.Text.Trim() == "" ? 0 : Convert.ToInt32(txtUuid.Text.Trim()); 4 string uusername2 = txtUuserName2.Text.Trim(); 5 try 6 { 7 using (con = new SqlConnection(constr)) 8 { 9 con.Open(); 10 string ssql = string.Format("select count(*) from UserInfor where userid='{0}'", Uid2); 11 cmd = new SqlCommand(ssql, con); 12 int icount = Convert.ToInt32(cmd.ExecuteScalar().ToString()); 13 if (icount> 0) 14 { 15 string ssql1 = string.Format("update UserInfor set UserName='{0}' where UserId='{1}'", uusername2, Uid2); 16 cmd = new SqlCommand(ssql1,con); 17 if (cmd.ExecuteNonQuery() > 0) 18 { 19 Response.Write("<script>alert('数据更新成功！');</script>"); 20 } 21 BindUserInfor(); 22 } 23 else 24 { 25 Response.Write("该用户不存在！"); 26 } 27 } 28 } 29 catch (Exception) 30 { 31 Response.Write("<script>alret('系统正在维护，请联系管理员!');</script>"); 32 } 33 }
二、Get传值：传一些安全系数低，Id,传类型，比较小的数据
1 <div> 2 <%=GetUserInfor()%> 3 </div>
1 public partial class UserInforManagerContext : System.Web.UI.Page 2 { 3 /// <summary> 4 ///通过这种方式把ID传了过去 ?<%#Eval("UserId") %>,接收get传值后的id 5 /// </summary> 6 /// <param name="sender"></param> 7 /// <param name="e"></param> 8 9 private int _userId;//定义一个字段,只可以访问 10 11 public int UserId 12 { 13 //get,set是属性，既可以访问，又可以写 14 get 15 { 16 try 17 { 18 _userId = Request.QueryString["Id"] == "" ? 0 : Convert.ToInt32(Request.QueryString["Id"].ToString()); 19 } 20 catch (Exception) 21 { 22 _userId = 0; 23 } 24 return _userId; 25 } 26 set { _userId = value; } 27 } 28 protected void Page_Load(object sender, EventArgs e) 29 { 30 31 } 32 33 public string GetUserInfor() 34 { 35 StringBuilder sb = new StringBuilder(); 36 sb.Append("<table>"); 37 try 38 { 39 if (UserId > 0) 40 { 41 string constr = ConfigurationManager.ConnectionStrings["sq_r"].ToString(); 42 using (SqlConnection con = new SqlConnection(constr)) 43 { 44 con.Open(); 45 string sString = string.Format("select * from UserInfor where UserId='{0}'", UserId); 46 SqlCommand cmd = new SqlCommand(sString, con); 47 using (SqlDataReader read = cmd.ExecuteReader()) 48 { 49 if (read.HasRows) 50 { 51 if (read.Read()) 52 { 53 sb.Append(string.Format("<tr><td>ID:</td><td>{0}</td></tr>", UserId)); 54 sb.Append(string.Format("<tr><td>用户名:</td><td>{0}</td></tr>", read["userName"].ToString())); 55 sb.Append(string.Format("<tr><td>电话号码:</td><td>{0}</td></tr>", read["PhoneNum"].ToString())); 56 sb.Append(string.Format("<tr><td>QQ:</td><td>{0}</td></tr>", read["QQ"].ToString())); 57 sb.Append(string.Format("<tr><td>信息:</td><td>{0}</td></tr>", read["Message"].ToString())); 58 } 59 } 60 } 61 } 62 } 63 else 64 { 65 sb.Append("<tr><td>未找到相关数据!</td></tr>"); 66 } 67 } 68 catch (Exception) 69 { 70 Response.Write("网站正在维护，请联系管理员!"); 71 } 72 sb.Append("</table>"); 73 return sb.ToString(); 74 } 75 }
三、批量删除:
3.1全选：
1 <div> 2 <table> 3 <tr> 4 <td>用户ID:</td> 5 <td> 6 <asp:TextBox ID="txtDUId" runat="server"></asp:TextBox> 7 </td> 8 <td> 9 <asp:Button ID="btnD" runat="server" Text="删除" OnClick="btnD_Click" /> 10 </td> 11 </tr> 12 </table> 13 </div> 14 <div class="dItem"> 15 <asp:Button ID="btnDelAll" runat="server" Text="批量删除" OnClick="btnDelAll_Click" OnClientClick="return confirm('你确定删除吗？');"/> 16 </div> 17 <div> 18 <asp:GridView ID="GriVShow" runat="server" AutoGenerateColumns="False"> 19 <Columns> 20 <asp:TemplateField> 21 <HeaderTemplate> 22 <asp:CheckBox ID="chkAll" runat="server" AutoPostBack="True" OnCheckedChanged="chkAll_CheckedChanged" /> 23 </HeaderTemplate> 24 <ItemTemplate> 25 <asp:CheckBox ID="chkItem" runat="server" /> 26 </ItemTemplate> 27 </asp:TemplateField> 28 <asp:BoundField DataField="Userid" HeaderText="用户ID" /> 29 <asp:BoundField DataField="UserName" HeaderText="用户名：" /> 30 <asp:BoundField DataField="phonenum" HeaderText="电话号码" /> 31 <asp:BoundField DataField="sex" HeaderText="性别" /> 32 <asp:BoundField DataField="phase" HeaderText="班级" /> 33 <asp:BoundField DataField="qq" HeaderText="QQ" /> 34 <asp:BoundField DataField="Message" HeaderText="信息" /> 35 <asp:BoundField DataField="HeadPic" HeaderText="头像" /> 36 <asp:BoundField DataField="CreatedTime" HeaderText="创建时间" /> 37 <asp:TemplateField HeaderText="详情"> 38 <ItemTemplate> 39 <a href="UserInforManagerContext.aspx?Id=<%#Eval("UserId")%>">详情</a> 40 </ItemTemplate> 41 </asp:TemplateField> 42 </Columns> 43 </asp:GridView> 44 </div>
1 public partial class UserInforManager : System.Web.UI.Page 2 { 3 string constr = ConfigurationManager.ConnectionStrings["sq_r"].ToString(); 4 SqlConnection con = null; 5 SqlCommand cmd = null; 6 SqlDataReader read = null; 7 protected void Page_Load(object sender, EventArgs e) 8 { 9 if (!(IsPostBack)) 10 { 11 BindUserInfor(); 12 } 13 } 14 /// <summary> 15 /// 数据绑定 16 /// </summary> 17 public void BindUserInfor() 18 { 19 try 20 { 21 //string strstring = "select Userid,UserName,phonenum,sex,phase,qq,Message,HeadPic,CreatedTime from UserInfor where 1=1"; 22 using (con = new SqlConnection(constr)) 23 { 24 con.Open(); 25 cmd = new SqlCommand(GetSql(), con); 26 using (read = cmd.ExecuteReader()) 27 { 28 //开始读以上sql数据,这句话一定要有，如果把它取出来的话是需要读的，但是这地方我只想它把内容赋值给gridview 29 //if (read.Read()) 30 //{ 31 //} 32 //但是这地方我只想它把内容赋值给gridview 33 //内容取出来之后，我希望有东西可以接收它的内容 34 GriVShow.DataSource = read; 35 GriVShow.DataBind(); 36 } 37 } 38 } 39 catch (Exception ex) 40 { 41 Response.Write("<script>alret('系统正在维护，请联系管理员!');</script>"); 42 } 43 } 44 45 protected void btnSel_Click(object sender, EventArgs e) 46 { 47 BindUserInfor(); 48 } 49 /// <summary> 50 /// 获取SQL 51 /// </summary> 52 /// <returns></returns> 53 public string GetSql() 54 { 55 //string username = txtSUserName.Text.Trim(); 56 //string phase = ddlselPhase.SelectedValue; 57 StringBuilder sb = new StringBuilder(); 58 sb.Append("select Userid,UserName,phonenum,sex,phase,qq,Message,HeadPic,CreatedTime from UserInfor where 1=1"); 59 if (!string.IsNullOrEmpty(txtSUserName.Text.Trim())) 60 { 61 sb.Append(string.Format("and UserName='{0}'", txtSUserName.Text.Trim())); 62 } 63 if (ddlselPhase.SelectedIndex > 0) 64 { 65 sb.Append(string.Format("and phase='{0}'", ddlselPhase.SelectedValue)); 66 } 67 return sb.ToString(); 68 } 69 70 protected void btnAdd_Click(object sender, EventArgs e) 71 { 72 try 73 { 74 string addUserName = txtAddUserName.Text.Trim(); 75 string addPwd = txtAddPwd.Text.Trim(); 76 string addqq = txtAddQq.Text.Trim(); 77 string addPhase = ddlAddPhase.SelectedIndex > 0 ? ddlAddPhase.SelectedValue : ""; 78 if (!string.IsNullOrEmpty(addUserName)) 79 { 80 using (con = new SqlConnection(constr)) 81 { 82 con.Open(); 83 string sstring1 = string.Format("insert into UserInfor(UserName,Pwd,QQ,Phase)values('{0}','{1}','{2}','{3}')", addUserName, addPwd, addqq, addPhase); 84 cmd = new SqlCommand(sstring1, con); 85 if (cmd.ExecuteNonQuery() > 0) 86 { 87 Response.Write("<script>alert('插入成功！');</script>"); 88 } 89 BindUserInfor(); 90 } 91 } 92 else 93 { 94 Response.Write("<script>alert('请输入内容');</script>"); 95 } 96 } 97 catch (Exception) 98 { 99 Response.Write("网页正在维护！"); 100 } 101 } 102 103 public void Del(int UserId) 104 { 105 try 106 { 107 using (con = new SqlConnection(constr)) 108 { 109 con.Open(); 110 string ssql = string.Format("select UserId from UserInfor where UserId='{0}'", UserId); 111 cmd = new SqlCommand(ssql, con); 112 read = cmd.ExecuteReader(); 113 if (read.HasRows) 114 { 115 read.Dispose(); 116 read.Close(); 117 string sstring1 = string.Format("delete UserInfor where UserId='{0}'", UserId); 118 cmd = new SqlCommand(sstring1, con); 119 if (cmd.ExecuteNonQuery() > 0) 120 { 121 Response.Write("<script>alert('删除成功！');</script>"); 122 } 123 124 } 125 else 126 { 127 Response.Write("该用户不存在！"); 128 } 129 } 130 } 131 catch (Exception ex) 132 { 133 Response.Write("<script>alret('系统正在维护，请联系管理员!');</script>"); 134 } 135 } 136 protected void btnD_Click(object sender, EventArgs e) 137 { 138 int UserId = txtDUId.Text.Trim() == "" ? 0 : Convert.ToInt32(txtDUId.Text.Trim()); 139 Del(UserId); 140 BindUserInfor(); 141 } 142 143 /// <summary> 144 /// 更新的第一种方法 145 /// </summary> 146 /// <param name="sender"></param> 147 /// <param name="e"></param> 148 protected void btnU_Click(object sender, EventArgs e) 149 { 150 int uId = txtUId.Text.Trim()==""?0:Convert.ToInt32(txtUId.Text.Trim()); 151 string uUserName = txtUUserName.Text.Trim(); 152 try 153 { 154 using (con = new SqlConnection(constr)) 155 { 156 con.Open(); 157 string ssql = string.Format("select UserId from UserInfor where UserId='{0}'", uId); 158 cmd = new SqlCommand(ssql, con); 159 read = cmd.ExecuteReader(); 160 if (read.HasRows) 161 { 162 read.Dispose(); 163 read.Close(); 164 string ssql1 = string.Format("update UserInfor set UserName='{0}' where UserId='{1}'", uUserName, uId); 165 cmd = new SqlCommand(ssql1, con); 166 if (cmd.ExecuteNonQuery() > 0) 167 { 168 Response.Write("更新成功！"); 169 } 170 BindUserInfor(); 171 } 172 else 173 { 174 Response.Write("该用户不存在！"); 175 } 176 } 177 } 178 catch (Exception) 179 { 180 Response.Write("<script>alret('系统正在维护，请联系管理员!');</script>"); 181 } 182 } 183 184 /// <summary> 185 /// 更新的第二种方法 186 /// </summary> 187 /// <param name="sender"></param> 188 /// <param name="e"></param> 189 protected void btnU2_Click(object sender, EventArgs e) 190 { 191 int Uid2 = txtUuid.Text.Trim() == "" ? 0 : Convert.ToInt32(txtUuid.Text.Trim()); 192 string uusername2 = txtUuserName2.Text.Trim(); 193 try 194 { 195 using (con = new SqlConnection(constr)) 196 { 197 con.Open(); 198 string ssql = string.Format("select count(*) from UserInfor where userid='{0}'", Uid2); 199 cmd = new SqlCommand(ssql, con); 200 int icount = Convert.ToInt32(cmd.ExecuteScalar().ToString()); 201 if (icount > 0) 202 { 203 string ssql1 = string.Format("update UserInfor set UserName='{0}' where UserId='{1}'", uusername2, Uid2); 204 cmd = new SqlCommand(ssql1, con); 205 if (cmd.ExecuteNonQuery() > 0) 206 { 207 Response.Write("<script>alert('数据更新成功！');</script>"); 208 } 209 BindUserInfor(); 210 } 211 else 212 { 213 Response.Write("该用户不存在！"); 214 } 215 } 216 } 217 catch (Exception) 218 { 219 Response.Write("<script>alret('系统正在维护，请联系管理员!');</script>"); 220 } 221 } 222 223 protected void chkAll_CheckedChanged(object sender, EventArgs e) 224 { 225 //1.当我们点击按钮时，去找chkAll它的事件源的对象把它变成checkBox 226 CheckBox chkAll = sender as CheckBox; 227 //2.对它的每一行进行遍历循环 228 foreach (GridViewRow gvr in GriVShow.Rows) 229 { 230 //2.1获得到第一行的第一列，找到每一列id等于chkitem的对象把它变成checkbox 231 CheckBox chkItem = gvr.Cells[0].FindControl("chkItem") as CheckBox; 232 //2.2让它当前全选的checked属性等于下面每一行的属性，选中就为true，没选就为Fulse 233 chkItem.Checked = chkAll.Checked; 234 } 235 } 236 237 protected void btnDelAll_Click(object sender, EventArgs e) 238 { 239 //1.对Gridview进行遍历循环 240 foreach (GridViewRow gvr in GriVShow.Rows) 241 { 242 //2.1获取到每行第二列的值 243 int UserId = Convert.ToInt32(gvr.Cells[1].Text); 244 //2.2获取到每一行的第一列就是去找ID等于chkItem的对象把它变成checkbox 245 CheckBox chkItem=gvr.Cells[0].FindControl("chkItem") as CheckBox; 246 if(chkItem.Checked) 247 { 248 Del(UserId); 249 } 250 } 251 BindUserInfor(); 252 } 253 }
4.GridView-模板绑定下拉列表数据
[首先这地方一定要与数据库要绑定的字段对应]，不然像楼主一样走了一个大坑
1 <asp:TemplateField HeaderText="班级"> 2 <ItemTemplate> 3 <asp:DropDownList ID="ddlgvPhase" runat="server" ToolTip='<%#Eval("phase")%>'> 4 <asp:ListItem>---请选择---</asp:ListItem> 5 <asp:ListItem>.NET高级班01期</asp:ListItem> 6 <asp:ListItem>.NET高级班02期</asp:ListItem> 7 <asp:ListItem>.NET讲师</asp:ListItem> 8 <asp:ListItem>.NET网站开发01期</asp:ListItem> 9 <asp:ListItem>.NET网站开发02期</asp:ListItem> 10 <asp:ListItem>.NET网站开发03期</asp:ListItem> 11 <asp:ListItem>.NET网站开发04期</asp:ListItem> 12 <asp:ListItem>.NET网站开发05期</asp:ListItem> 13 <asp:ListItem>.NET网站开发06期</asp:ListItem> 14 <asp:ListItem>.NET网站开发07期</asp:ListItem> 15 <asp:ListItem>.NET网站开发08期</asp:ListItem> 16 <asp:ListItem>.NET网站开发09期</asp:ListItem> 17 <asp:ListItem>.NET网站开发10期</asp:ListItem> 18 <asp:ListItem>.NET网站开发11期</asp:ListItem> 19 <asp:ListItem>.NET网站开发12期</asp:ListItem> 20 <asp:ListItem>.NET网站开发13期</asp:ListItem> 21 <asp:ListItem>.NET网站开发14期</asp:ListItem> 22 <asp:ListItem>ps设计01期</asp:ListItem> 23 <asp:ListItem>ps设计03期</asp:ListItem> 24 <asp:ListItem>网页前端01期</asp:ListItem> 25 </asp:DropDownList> 26 </ItemTemplate> 27 </asp:TemplateField>
这时候，我们需要调用gridView的RowDataBound事件，当我们打开浏览器，gridView加载从第一行到第二行的逐行加载，加载的时候就执行这个方法，为什么要调用这个方法呢？表示对gridView进行一个遍历
如何找到这个事件呢？GridView的属性-事件里就有，找到双击就好
1 protected void GriVShow_RowDataBound(object sender, GridViewRowEventArgs e) 2 { 3 //判断当前行是不是数据行 4 //获取到某行输入的数据把它变成UserInfor类型,对象才能调用它的属性方法 5 //e.Row.DataItem当前行的数据集 6 //找打当前行的班级 7 if (e.Row.RowType == DataControlRowType.DataRow) 8 { 9 DropDownList ddlPhase = e.Row.FindControl("ddlgvPhase") as DropDownList; 10 string phase = ddlPhase.ToolTip; 11 if (!string.IsNullOrEmpty(phase)) 12 { 13 //清空列表里所有的项 14 ddlPhase.ClearSelection(); 15 ddlPhase.Items.FindByValue(phase).Selected = true; 16 } 17 } 18 }
5.批量更新:
userinfor这个常用的东西，我们直接封装成一个方法，直接调用该方法就好
1 SqlConnection con = null; 2 SqlCommand cmd = null; 3 SqlDataReader read = null; 4 string constr = ConfigurationManager.ConnectionStrings["sq_r"].ToString(); 5 protected void Page_Load(object sender, EventArgs e) 6 { 7 if (!(IsPostBack))//页面第一次加载 8 { 9 BindUserInfor(); 10 } 11 } 12 13 public void BindUserInfor() 14 { 15 try 16 { 17 using (con = new SqlConnection(constr)) 18 { 19 // where 1=1 order by UserId desc 20 con.Open(); 21 string sSql = "select top 100 Userid,UserName,Pwd,phonenum,phase,qq,CreatedTime from UserInfor where 1=1 order by UserId desc"; 22 cmd = new SqlCommand(sSql, con); 23 using (read = cmd.ExecuteReader()) 24 { 25 GriVShow.DataSource = read; 26 GriVShow.DataBind(); 27 } 28 } 29 } 30 catch (Exception) 31 { 32 Response.Write("网页正在维护!"); 33 } 34 }
前台实例的代码都在这：
1 <form id="form1" runat="server"> 2 <div class="dItem"> 3 <table> 4 <tr> 5 <td> 6 <asp:Button ID="btnDelAll" runat="server" Text="批量删除" OnClick="btnDelAll_Click" OnClientClick="return confirm('你确定删除吗？');"/> 7 </td> 8 <td> 9 <asp:Button ID="btnUpAll" runat="server" Text="批量修改" OnClick="btnUpAll_Click" /> 10 </td> 11 <td> 12 <asp:Button ID="btnAddBottom" runat="server" Text="添加" OnClick="btnAddBottom_Click" /> 13 </td> 14 </tr> 15 </table> 16 </div> 17 <div> 18 <asp:GridView ID="GriVShow" runat="server" AutoGenerateColumns="False" OnRowDataBound="GriVShow_RowDataBound"> 19 <Columns> 20 <asp:TemplateField> 21 <HeaderTemplate> 22 <asp:CheckBox ID="chkAll" runat="server" AutoPostBack="True" OnCheckedChanged="chkAll_CheckedChanged" /> 23 </HeaderTemplate> 24 <ItemTemplate> 25 <asp:CheckBox ID="chkItem" runat="server" /> 26 </ItemTemplate> 27 </asp:TemplateField> 28 <asp:BoundField DataField="Userid" HeaderText="ID" /> 29 <asp:BoundField DataField="UserName" HeaderText="用户名：" /> 30 <asp:BoundField DataField="phonenum" HeaderText="电话号码" /> 31 <asp:BoundField DataField="qq" HeaderText="QQ" /> 32 <asp:BoundField DataField="phase" HeaderText="班级" /> 33 <asp:BoundField DataField="CreatedTime" HeaderText="创建时间" /> 34 <asp:TemplateField HeaderText="用户名"> 35 <ItemTemplate> 36 <asp:TextBox ID="txtgvUserName" runat="server" Text='<%#Eval("UserName")%>'></asp:TextBox> 37 </ItemTemplate> 38 </asp:TemplateField> 39 <asp:TemplateField HeaderText="密码"> 40 <ItemTemplate> 41 <asp:TextBox ID="txtgvPwd" runat="server" Text='<%#Eval("Pwd")%>'></asp:TextBox> 42 </ItemTemplate> 43 </asp:TemplateField> 44 <asp:TemplateField HeaderText="QQ"> 45 <ItemTemplate> 46 <asp:TextBox ID="txtgvQq" runat="server" Text='<%#Eval("QQ")%>'></asp:TextBox> 47 </ItemTemplate> 48 </asp:TemplateField> 49 <asp:TemplateField HeaderText="班级"> 50 <ItemTemplate> 51 <asp:DropDownList ID="ddlgvPhase" runat="server" ToolTip='<%#Eval("phase")%>'> 52 <asp:ListItem>---请选择---</asp:ListItem> 53 <asp:ListItem>.NET高级班01期</asp:ListItem> 54 <asp:ListItem>.NET高级班02期</asp:ListItem> 55 <asp:ListItem>.NET讲师</asp:ListItem> 56 <asp:ListItem>.NET网站开发01期</asp:ListItem> 57 <asp:ListItem>.NET网站开发02期</asp:ListItem> 58 <asp:ListItem>.NET网站开发03期</asp:ListItem> 59 <asp:ListItem>.NET网站开发04期</asp:ListItem> 60 <asp:ListItem>.NET网站开发05期</asp:ListItem> 61 <asp:ListItem>.NET网站开发06期</asp:ListItem> 62 <asp:ListItem>.NET网站开发07期</asp:ListItem> 63 <asp:ListItem>.NET网站开发08期</asp:ListItem> 64 <asp:ListItem>.NET网站开发09期</asp:ListItem> 65 <asp:ListItem>.NET网站开发10期</asp:ListItem> 66 <asp:ListItem>.NET网站开发11期</asp:ListItem> 67 <asp:ListItem>.NET网站开发12期</asp:ListItem> 68 <asp:ListItem>.NET网站开发13期</asp:ListItem> 69 <asp:ListItem>.NET网站开发14期</asp:ListItem> 70 <asp:ListItem>ps设计01期</asp:ListItem> 71 <asp:ListItem>ps设计03期</asp:ListItem> 72 <asp:ListItem>网页前端01期</asp:ListItem> 73 </asp:DropDownList> 74 </ItemTemplate> 75 </asp:TemplateField> 76 <asp:TemplateField HeaderText="详情"> 77 <ItemTemplate> 78 <a href="UserInforManagerContext.aspx?Id=<%#Eval("UserId")%>">详情</a> 79 </ItemTemplate> 80 </asp:TemplateField> 81 </Columns> 82 </asp:GridView> 83 </div> 84 </form>
封装了一个更新的方法，直接调用该方法即可
1 public void UpUser(int userId,string username,string pwd,string qq,string phase) 2 { 3 try 4 { 5 using (con = new SqlConnection(constr)) 6 { 7 con.Open(); 8 string ssql= string.Format("update UserInfor set UserName='{0}',Pwd='{1}',QQ='{2}',Phase='{3}' where UserId='{4}'", username, pwd, qq, phase, userId); 9 cmd = new SqlCommand(ssql, con); 10 if (cmd.ExecuteNonQuery() > 0) 11 { 12 Response.Write("<script>alert('数据更新成功！');</script>"); 13 } 14 } 15 } 16 catch (Exception) 17 { 18 Response.Write("网页正在维护!"); 19 } 20 21 } 22 /// <summary> 23 /// 批量更新 24 /// </summary> 25 /// <param name="sender"></param> 26 /// <param name="e"></param> 27 protected void btnUpAll_Click(object sender, EventArgs e) 28 { 29 //遍历gridView 30 foreach (GridViewRow gvr in GriVShow.Rows) 31 { 32 int UserId = Convert.ToInt32(gvr.Cells[1].Text); 33 CheckBox chkItem = gvr.Cells[0].FindControl("chkItem") as CheckBox; 34 if (chkItem.Checked) 35 { 36 TextBox txtusername = gvr.Cells[7].FindControl("txtgvUserName") as TextBox; 37 TextBox txtpwd = gvr.Cells[8].FindControl("txtgvPwd") as TextBox; 38 TextBox txtqq = gvr.Cells[9].FindControl("txtgvQq") as TextBox; 39 DropDownList ddlphase = gvr.Cells[10].FindControl("ddlgvPhase") as DropDownList; 40 UpUser(UserId,txtusername.Text,txtpwd.Text,txtqq.Text,ddlphase.SelectedValue); 41 } 42 } 43 BindUserInfor(); 44 }
5.添加的后台代码：双击添加按钮进入后台事件
1 protected void btnAdd_Click(object sender, EventArgs e) 2 { 3 try 4 { 5 using (con = new SqlConnection(constr)) 6 { 7 con.Open(); 8 string ssql = string.Format("insert into UserInfor (Phase,CreatedTime) values('{0}','{1}')", "网页前端01期", DateTime.Now.ToString()); 9 cmd = new SqlCommand(ssql, con); 10 cmd.ExecuteNonQuery(); 11 } 12 BindUserInfor(); 13 } 14 catch (Exception) 15 { 16 Response.Write("网页正在维护!"); 17 } 18 }
标签：
版权申明：本站文章部分自网络，如有侵权，请联系：west999com@outlook.com
特别注意：本站所有转载文章言论不代表本站观点，本站所提供的摄影照片，插画，设计作品，如需使用，请与原作者联系，版权归原作者所有
上一篇：了解MVC框架开发
相关文章
- 基于原生的 html css js php ajax做的一个 web登录和注册系 2020-02-21
- 注册登录页面模板 2019-12-10
- 做一个好看的可翻转登录注册界面 2019-11-18
- 免费搜索引擎提交(登录)入口大全 2019-10-28
- 布局登录页面的方法 2019-09-08
IDC资讯： 主机资讯 注册资讯 托管资讯 vps资讯 网站建设
网站运营： 建站经验 策划盈利 搜索优化 网站推广 免费资源
网络编程： Asp.Net编程 Asp编程 Php编程 Xml编程 Access Mssql Mysql 其它
服务器技术： Web服务器 Ftp服务器 Mail服务器 Dns服务器 安全防护
软件技巧： 其它软件 Word Excel Powerpoint Ghost Vista QQ空间 QQ FlashGet 迅雷
网页制作： FrontPages Dreamweaver Javascript css photoshop fireworks Flash
热门词条
最新资讯
热门关注
热门标签