FileUpload控件预览图片

2018-06-18 04:49:05来源：未知阅读 ()

HTML代码：

<tr>
                            <td class="auto-style1">上传图片：</td>
                            <td>
                                <asp:FileUpload ID="FileUpload1" runat="server" onchange="chgImg(this)" />
                                <div>
                                    <img src="" id="Photo" runat="server" style="max-height: 80px" />
                                </div>
                                <div id="preview"></div>
                                <p>图片路径：<asp:Label ID="lalimageUrl" runat="server" Text=""></asp:Label></p>
                            </td>
                        </tr>

View Code

JS代码：

function chgImg(file){
//img控件预览图片
        var FileUpload1 = $("#FileUpload1").val();
        $("#Photo").attr("src", "file:///" + FileUpload1);
    //div预览图片（兼容模式）
        var prevDiv = document.getElementById('preview');
        if (file.files && file.files[0]) {
            var reader = new FileReader();
            reader.onload = function (evt) {
                prevDiv.innerHTML = '<img src="' + evt.target.result + '" style="max-height:80px" />';
            }
            reader.readAsDataURL(file.files[0]);
        }
        else {
            prevDiv.innerHTML = '<div class="img" style="max-height:80px;filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale,src=\'' + file.value + '\')"></div>';
        }
}