asp.net - ASP.NET AsyncFileUpload RegisterClientScriptBlock无效

我在使用ScriptManager的RegisterClientScriptBlock时遇到问题，但无效。

我有一个AsyncFileUpload，我想在上传后动态预览上传的图片。

UploadedComplete在Page_Init中连接，这里是服务器端的UloadedComplete块代码

void fileUpload_UploadedComplete(object sender, AjaxControlToolkit.AsyncFileUploadEventArgs e)
{
    string csb = string.Empty; 
    string tempfolder = "picserver/posts/temp/" + Session["Username"] + "_" + DateTime.Today.ToString("yyyy_MM_d") + ".jpg";
    string newfile = Server.MapPath(tempfolder);

    fileUpload.SaveAs(newfile);

    Byte[] f = File.ReadAllBytes(newfile);
    Imaging i = new Imaging();
    i.ResizeImageFile(newfile, newfile, 64);

    csb = "$(\"" + postImagePreview.ClientID + "\").innerHTML = '<img src=\"" + tempfolder + "\" alt=\"\" />'";
    System.Diagnostics.Debug.WriteLine("CSB: " + csb);
    ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "preview", csb, true);
}

这是html

<asp:Label ID="postImagePreview" runat="server" />
Upload a preview of your advertisement.

<asp:AsyncFileUpload ID="fileUpload" runat="server"
    UploaderStyle="Traditional" UploadingBackColor="#CCFFFF" ThrobberID="myThrobber" />
    <asp:Label runat="server" ID="myThrobber" style="display:none;" ></asp:Label>

这是我的ScriptBlock

csb = "$(\"" + postImagePreview.ClientID + "\").innerHTML = '<img src=\"" + tempfolder + "\" alt=\"\" />'";
ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "preview", csb, true);

并且它不起作用..即使我把“alert（'hello'）;”在脚本参数中。仍然不起作用。

你们有什么想法？

ASP.NET AsyncFileUpload RegisterClientScriptBlock无效

1 个答案: