asp.net error creating control
i just opened my asp.net solution and am getting this message on every control on my application!
here is my code:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="EnterData.DataEntry.WebForm1" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>
<!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></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<br /><table>
<tr>
<td>
lom_number:
</td>
<td><asp:TextBox ID="lom_numberTextBox" runat="server"
Text=''/></td>
<td>occurrence_date:</td>
<td><asp:TextBox ID="occurrence_dateTextBox" runat="server"
Text='<%# Bind("occurrence_date") %>' />
<asp:MaskedEditExtender ID="MaskedEditExtender1"
TargetControlID="occurrence_dateTextBox"
Mask="99/99/9999"
MessageValidatorTip="true"
OnFocusCssClass="MaskedEditFocus"
OnInvalidCssClass="MaskedEditError"
MaskType="Date"
InputDirection="RightToLeft"
AcceptNegative="Left"
DisplayMoney="Left"
ErrorTooltipEnabled="True" runat="server"/></td>
<td>report_date:</td>
<td><asp:TextBox ID="report_dateTextBox" runat="server"
Text='<%# Bind("report_date") %>' /></td>
<td>spec_id:</td>
<td><asp:TextBox ID="spec_idTextBox" runat="server" Text='<%# Bind("spec_id") %>' /></td>
</tr>
<tr>
<td>batch_id:</td>
<td><asp:TextBox ID="batch_idTextBox" runat="server"
Text='<%# Bind("batch_id") %>' /></td>
<td>report_by:</td>
<td>
<asp:TextBox ID="report_byTextBox" runat="server"
Text='<%# Bind("report_by") %>' /></td>
<td>identified_by:</td>
<td><asp:TextBox ID="identified_byTextBox" runat="server"
Text='<%# Bind("identified_by") %>' /></td>
<td>problem:</td>
<td><asp:TextBox ID="problemTextBox" runat="server" Text='<%# Bind("problem") %>' /></td>
<td></td>
</tr></table>
<table><tr><td>section_c_issue_error_identified_by:</td>
<td>
<asp:TextBox ID="section_c_issue_error_identified_byTextBox" width="500" runat="server"
Text='<%# Bind("section_c_issue_error_identified_by") %>' />
</td></tr>
<tr><td>section_c_comments:</td><td><asp:TextBox ID="section_c_commentsTextBox" Width="500" runat="server"
Text='<%# Bind("section_c_comments") %>' /></td></tr>
<tr><td>section_d_investigation:</td><td>
<asp:TextBox ID="section_d_investigationTextBox" runat="server"
Text='<%# Bind("section_d_investigation") %>' /></td></tr>
<tr><td>section_e_corrective_action:</td> <td><asp:TextBox ID="section_e_corrective_actionTextBox" runat="server"
Text='<%# Bind("section_e_corrective_action") %>' /></td></开发者_Python百科tr>
<tr><td>section_f_comments:</td><td><asp:TextBox ID="section_f_commentsTextBox" runat="server"
Text='<%# Bind("section_f_comments") %>' /></td></tr>
</table>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="SubmitData" />
</div>
</form>
</body>
</html>
does anyone know what i am doing wrong?
It's just happened to me. It happened when I renamed page and moved aspx file within project folders, but code inside left unrenamed.
Change code inside from:
public partial class foldername_unrenamedname : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
}
to current
public partial class newfoldername_renamedname : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
}
And also edit Inherits property in Page tag to:
Inherits="Newfoldername_renamedname"
You can resolve this error by following the below steps , the root cause of this error is the incorrect mapping between web application project and the virtual directory in your IIS.
To Resolve this error , follow the following steps:
1-Right click - you web application project and select Properties -> Web
2- in the server section choose Use IIS Web Server -> then click Create Virtual.
3- Clean your project and compile again.
done :)
This info is on following site.
http://weblogs.asp.net/hosamkamel/archive/2007/09/15/resolving-error-creating-control-xxx-in-web-application-project.aspx
Here is another article which proposed different solution and cause there is that object is not initialized before use.
http://blogs.msdn.com/b/webdevtools/archive/2010/05/06/another-error-creating-control-in-the-design-view-with-object-reference-not-set-in-visual-studio-2010.aspx
Closed the aspx designer, cleaned the project and rebuild it, everything started working perfectly. (using Visual Studio 2015)
I had the same problem with all my pages. I changed the version of .NETFramework and it worked. The version of .NETFramework at the time when components were added was different from the current version.
I had the same problem and I tried all of the above but none of them worked for me.
What did work was the following: Go to Project->Properties click on Web and then change the Server (mine was defined as Local IIS) to External IIS and Save.
I didn't even have to restart VS and the controls re-appeared correctly.
Once you get your controls to appear properly, you can change your Web->Server settings back to what they were before.
加载中,请稍侯......
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