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當我在asp.net中使用圖像控件與updatepanel,編譯器給出了一個錯誤:NullReference異常,
請任何機構幫助我。所以應該做些什麼來避免這種問題?NullException在圖像控制與ASP.NET的UpdatePanel控件中的錯誤
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<div>
<asp:AsyncFileUpload ID="flduserphoto" runat="server"
OnClientUploadComplete="OnClientAsyncFileUploadComplete"
OnUploadedComplete="OnAsyncFileUploadComplete" Width="374px" />
<asp:Image runat="server" ID="imgPhoto" Width="150px" />
</div>
</ContentTemplate>
</UpdatePanel>
代碼文件,
public partial class Registration_frmUserRegistration : System.Web.UI.Page
{
DataTable dt;
#region FileUploadControl Section
protected void OnAsyncFileUploadComplete(object sender, AsyncFileUploadEventArgs e)
{
if (flduserphoto.FileBytes != null)
{
lblgender.Text = "asdf";
Context.Session.Add("SessionImage", flduserphoto.FileBytes);
}
}
#endregion
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnSave_Click(object sender, EventArgs e)
{
BALUserAddress objUserAddress = new BALUserAddress();
objUserAddress.UserType = ddlusertype.Text;
byte[]imageByte = new byte[flduserphoto.PostedFile.ContentLength];
objUserAddress.ProfilePicture=imageByte;
objUserAddress.ParentID = "0";
objUserAddress.RelationWith="Self";
objUserAddress.RegistrationDateTime= DateTime.Now;
string msg = objUserAddress.SaveUserDetails();
lblMsg.Text=msg;
mpMsg.Show();
}
}
,這是我的代碼文件,請檢查一下
分享你的代碼可以幫助你 – Arshad
對不便,我編輯我的問題,請檢查它。 – mmj89
你能不能請更新你的.cs代碼? – Neo