C# GridView 排序及分页

2019-06-14 08:02:43来源: 阅读 ()

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  如果你在GridView控件上设置 AllowPaging="true" or AllowSorting="true" 而没有使用使用数据源控件 DataSource (i.e. SqlDataSource, ObjectDataSource),运行则会出现下列错误。

当你在GridView控件上单击下一页时:

The GridView 'GridViewID' fired event PageIndexChanging which wasn't handled.

当你点击排序时,则回出现:

The GridView 'GridViewID' fired event Sorting which wasn't handled.

如果你没有设置GridView的DataSourceID 的属性,你必须添加一个操作才可以排序及分页。。


; 点这里查看下面的例子

<%@ Page Language="C#" %>

<%@ Import Namespace="System.Data" %>

<%@ Import Namespace="System.Data.OleDb" %>

<script runat="server">;;;

PRivate void PopulatePublishersGridView()

{

string connectionString = accessConnectionString();

OleDbConnection accessConnection = new OleDbConnection(connectionString);

string sqlQuery = "SELECT [PubID], [Name], [Company Name], [Address], [City], [State], [Zip], [Telephone], [Fax], [Comments] FROM Publishers ORDER BY [Name] ASC;";

OleDbCommand accessCommand = new OleDbCommand(sqlQuery, accessConnection);

OleDbDataAdapter publishersDataAdapter = new OleDbDataAdapter(accessCommand);

DataTable publishersDataTable = new DataTable("Publishers");

publishersDataAdapter.Fill(publishersDataTable);

int dataTableRowCount = publishersDataTable.Rows.Count;

if (dataTableRowCount > 0)

{

gridViewPublishers.DataSource = publishersDataTable;

gridViewPublishers.DataBind();

}

}

private string AccessConnectionString()

{

string accessDatabasePath = Server.MapPath("~/App_Data/biblio.mdb");

return String.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};", accessDatabasePath);

}

private string GridViewSortDirection

{

get { return ViewState["SortDirection"] as string ?? "ASC"}

set { ViewState["SortDirection"] = value; }

}

private string GridViewSortExpression

{

get { return ViewState["SortExpression"] as string ?? string.Empty; }

set { ViewState["SortExpression"] = value; }

}

private string GetSortDirection()

{

switch (GridViewSortDirection)

{

case "ASC":

GridViewSortDirection = "DESC";

break;

case "DESC":

GridViewSortDirection = "ASC";

break;

}

return GridViewSortDirection;

}

protected void gridViewPublishers_PageIndexChanging(object sender, GridViewPageEventArgs e)

{

gridViewPublishers.DataSource = SortDataTable(gridViewPublishers.DataSource as DataTable, true);

gridViewPublishers.PageIndex = e.NewPageIndex;

gridViewPublishers.DataBind();

}

protected DataView SortDataTable(DataTable dataTable, bool isPageIndexChanging)

{

if (dataTable != null)

{

DataView dataView = new DataView(dataTable);

if (GridViewSortExpression != string.Empty)

{

if (isPageIndexChanging)

{

dataView.Sort = string.Format("{0} {1}", GridViewSortExpression, GridViewSortDirection);

}

else

{

dataView.Sort = string.Format("{0} {1}", GridViewSortExpression, GetSortDirection());

}

}

return dataView;

}

else

{

return new DataView();

}

}

protected void gridViewPublishers_Sorting(object sender, GridViewSortEventArgs e)

{

GridViewSortExpression = e.SortExpression;

int pageIndex = gridViewPublishers.PageIndex;

gridViewPublishers.DataSource = SortDataTable(gridViewPublishers.DataSource as DataTable, false);

gridViewPublishers.DataBind();

gridViewPublishers.PageIndex = pageIndex;

}

protected void Page_Load(object sender, EventArgs e)

{

PopulatePublishersGridView();

}

</script>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

<title>GridView Sorting/Paging without a DataSourceControl DataSource</title>

</head>

<body>

<form id="form" runat="server">

<div>

<asp:GridView ID="gridViewPublishers" AllowPaging="true" AllowSorting="true" AutoGenerateColumns="false"

EmptyDataText="No records found" PagerSettings-Mode="NumericFirstLast" PageSize="25"

OnPageIndexChanging="gridViewPublishers_PageIndexChanging" OnSorting="gridViewPublishers_Sorting"

runat="server">

<AlternatingRowStyle BackColor="LightGray" />

<HeaderStyle BackColor="Gray" Font-Bold="true" Font-Names="Verdana" Font-Size="Small" />

<PagerStyle BackColor="DarkGray" Font-Names="Verdana" Font-Size="Small" />

<RowStyle Font-Names="Verdana" Font-Size="Small" />

<Columns>

<asp:BoundField DataField="PubID" HeaderText="Publisher ID" SortExpression="PubID" />

<asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name" />

<asp:BoundField DataField="Company Name" HeaderText="Company Name" SortExpression="Company Name" />

<asp:BoundField DataField="Address" HeaderText="Address" SortExpression="Address" />

<asp:BoundField DataField="City" HeaderText="City" SortExpression="City" />

<asp:BoundField DataField="State" HeaderText="State" SortExpression="State" />

<asp:BoundField DataField="Zip" HeaderText="Zip" SortExpression="Zip" />

<asp:BoundField DataField="Telephone" HeaderText="Telephone" SortExpression="Telephone" />

<asp:BoundField DataField="Fax" HeaderText="Fax" SortExpression="Fax" />

<asp:BoundField DataField="Comments" HeaderText="Comments" SortExpression="Comments" />

</Columns>

</asp:GridView>

</div>

</form>

</body>

</html>

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