在按钮上单击控件不转到 Sub

Question

我有带id = btnUploadxml的按钮，如图所示;

<td>
<div id="divUpload" runat="server">
<asp:FileUpload ID="FileUpload1" runat="server" 
style="font-family: Tahoma, Verdana, Arial, Helvetica, MS Sans Serif;font-size: 9pt; font-weight:bolder;" 
BackColor="White" ForeColor="Black" Height="50px" 
CssClass="ceva-form-btn btn-dialog" Width="458px" />              
<asp:Button  Text="Import File" runat="server" ID="btnUploadxml"   />
<br />
<br />
</div>
</td>

单击按钮后，控件应转到

Public Sub btnUploadxml_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUploadxml.Click
If Not FileUpload1.HasFile Then
ErImport.Text = "ErImport, File required"
ErImport.Visible = "True"
'UIValidator.AddErrorSummary("", "Select file to import", "File required")

单击控件应该转到我的btnUploadxml_Click子，但有些它如何给我错误

"System.InvalidOperationException： 由于对象的当前状态，操作无效。

请指教！！

Answer 1

尝试将以下代码放入Web.config文件中：

<appSettings>
<add key="aspnet:MaxHttpCollectionKeys" value="2001" />
</appSettings>

您将覆盖默认值 1000。尝试 2001 或更大的值。 此值的定义如下：

aspnet:MaxHttpCollectionKeys
Limits the maximum number of items that can be present in any of the client-   provided dictionaries of the HttpRequest object.