我有一个树形视图，显示最近插入的问题的摘要。我试图从树视图的数据绑定事件中附加 NavigateUrl。
这里我包括树视图：
<asp:TreeView ID="TV_Question_Summary" runat="server" ImageSet="Simple"
ShowLines="True" ondatabound="TV_Question_Summary_DataBound">
<DataBindings>
<asp:TreeNodeBinding DataMember="ParentNode" FormatString=" {0}" TextField="Inquiry_id" ValueField="Inquiry_id"/>
<asp:TreeNodeBinding DataMember="Node" FormatString=" {0}" TextField="body" ValueField="Inquiry_id" />
</DataBindings>
</asp:TreeView>
这段代码将inquiryid值绑定到每个节点：
public void TV_Question_Summary_DataBound(object sender, TreeNodeEventArgs e)
{
e.Node.NavigateUrl = "~/Admin/OWM_Inquiry.aspx?inquiryid=" + e.Node.Value;
}
这个错误是如何发生的编译时间：
Error 3 No overload for 'TV_Question_Summary_DataBound' matches delegate 'System.EventHandler' C:\Documents and Settings\Vishal\My Documents\Visual Studio 2005\WebSites\OmInvestmentStockMarketing_new\Admin\MasterPage.master 1 1 C:\...\OmInvestmentStockMarketing_new\
- - - - - - - - - - - - - - - - 更新 - - - - - - - - - ------------
我的存储过程：
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[ViewSummaryOfQuestions]
AS
BEGIN
SET NOCOUNT ON;
SELECT tbl_Inquiry_History.Inquiry_id, tbl_Question.body
FROM tbl_Inquiry_History INNER JOIN
tbl_Question ON tbl_Inquiry_History.Inquiry_id = tbl_Question.Inquiry_id
WHERE(tbl_Question.IsCount='False')
--UPDATE [OmStocks].[dbo].[tbl_Question]
--SET [IsCount] = 'True'
--WHERE (IsCount='False')
END
并返回输出：
-------------------------------------------------
Inquiry_id body
-------------------------------------------------
119 -CDNE-2013 i just want service ...
119 -UXCY-2013 I just want to service please...
119 -CDNE-2013 hurry up...
-------------------------------------------------
为了将此输出绑定到树视图，我使用以下代码：
void fill_Tree()
{
using (SqlConnection conn = Util.GetConnection())
{
conn.Open();
SqlCommand SqlCmd = new SqlCommand("Select * from tbl_Inquiry_History", conn);
SqlDataReader Sdr = SqlCmd.ExecuteReader();
SqlCmd.Dispose();
string[,] ParentNode = new string[100, 2];
int count = 0;
while (Sdr.Read())
{
ParentNode[count, 0] = Sdr.GetValue(Sdr.GetOrdinal("Inquiry_id")).ToString();
ParentNode[count++, 1] = Sdr.GetValue(Sdr.GetOrdinal("Inquiry_id")).ToString();
}
Sdr.Close();
for (int loop = 0; loop < count; loop++)
{
TreeNode root = new TreeNode();
root.Text = ParentNode[loop, 1];
//root.Target = "_blank";
root.NavigateUrl = "~/Admin/OWM_Inquiry.aspx?inquiryid="+ ParentNode[loop, 1];
SqlCommand Module_SqlCmd = new SqlCommand("Select * from tbl_Question where (Inquiry_id =" + ParentNode[loop, 0] + "AND IsCount='False')", conn);
SqlDataReader Module_Sdr = Module_SqlCmd.ExecuteReader();
while (Module_Sdr.Read())
{
TreeNode child = new TreeNode();
child.Text = Module_Sdr.GetValue(Module_Sdr.GetOrdinal("body")).ToString();
//child.Target = "_blank";
child.NavigateUrl = "~/Admin/OWM_Inquiry.aspx?inquiryid="+ParentNode[loop, 0];
root.ChildNodes.Add(child);
}
Module_Sdr.Close();
TV_Question_Summary.Nodes.Add(root);
}
TV_Question_Summary.CollapseAll();
}
}
但这给了我这样的错误：
“/OmInvestmentStockMarketing_new”应用程序中的服务器错误。
列名“CDNE”无效。
说明：执行当前 Web 请求期间发生未处理的异常。请查看堆栈跟踪以获取有关错误及其源自代码的位置的更多信息。
Exception Details: System.Data.SqlClient.SqlException: Invalid column name 'CDNE'.
Source Error:
Line 146: root.NavigateUrl = "~/Admin/OWM_Inquiry.aspx?inquiryid="+ ParentNode[loop, 1];
Line 147: SqlCommand Module_SqlCmd = new SqlCommand("Select * from tbl_Question where (Inquiry_id =" + ParentNode[loop, 0] + "AND IsCount='False')", conn);
Line 148: SqlDataReader Module_Sdr = Module_SqlCmd.ExecuteReader();
Line 149: while (Module_Sdr.Read())
Line 150: {
Source File: c:\Documents and Settings\Vishal\My Documents\Visual Studio 2005\WebSites\OmInvestmentStockMarketing_new\Admin\MasterPage.master.cs Line: 148
Stack Trace:
[SqlException (0x80131904): Invalid column name 'CDNE'.]
System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) +1948826
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +4844747
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +194
System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +2392
System.Data.SqlClient.SqlDataReader.ConsumeMetaData() +33
System.Data.SqlClient.SqlDataReader.get_MetaData() +83
System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) +297
System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) +954
System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) +162
System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) +32
System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) +141
System.Data.SqlClient.SqlCommand.ExecuteReader() +89
Admin_MasterPage.fill_Tree() in c:\Documents and Settings\Vishal\My Documents\Visual Studio 2005\WebSites\OmInvestmentStockMarketing_new\Admin\MasterPage.master.cs:148
Admin_MasterPage.Page_Load(Object sender, EventArgs e) in c:\Documents and Settings\Vishal\My Documents\Visual Studio 2005\WebSites\OmInvestmentStockMarketing_new\Admin\MasterPage.master.cs:101
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
System.Web.UI.Control.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +50
System.Web.UI.Control.LoadRecursive() +141
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627
Version Information: Microsoft .NET Framework Version:2.0.50727.3053; ASP.NET Version:2.0.50727.3053