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我在用戶控件中有一個文本框。我創建dinamically此用戶控件和加載佔位符。將值設置爲位於佔位符內的UserControl中的TextBox
但是,當我嘗試將值分配給該文本框,我提出下一個下面的錯誤:
Object reference not set to an instance of an object
這是用戶控制:
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="IVT_FormClient.ascx.cs" Inherits="Evi.Sc.Web.Evi.IVT.Sublayouts.IVT_FormClient" %>
<asp:Panel ID="pnlContainer" runat="server">
<asp:TextBox ID="txtClientNumber" runat="server"></asp:TextBox>
</asp:Panel>
接入改性劑是(在用戶控制):
public string TxtFirstName
{
get { return txtFirstName.Text; }
set { txtFirstName.Text = value; }
}
在web形式I具有控制基準:
<%@ Reference Control="~/Evi/IVT/Sublayouts/IVT_FormClient.ascx" %>
在用戶控件的後面的代碼是:
public partial class frm_VerifyIdentity : System.Web.UI.Page
{
IVT_FormClient ivtFormClient = new IVT_FormClient();
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
IVT_FormClient ivtFormClient = (IVT_FormClient)LoadControl("~/Evi/IVT/Sublayouts/IVT_FormClient.ascx");
Client UserClient = new Client();
UserClient = Load_ClientVerification(Server.HtmlEncode(Request.QueryString["ID"]).Trim());
if (UserClient != null)
{
ivtFormClient.TxtFirstName = UserClient.FirstName;
plhFormClient.Controls.Add(ivtFormClient);
}
}
}
}
錯誤發生的是這行代碼:
ivtFormClient.TxtFirstName = UserClient.FirstName;
謝謝,這個問題就解決了。 –