[英]ASP.NET C# The Wait Operation Timed Out
遇到使我的整個網站崩潰的錯誤。 等待操作正在超時,我已閱讀了using {}塊的文檔,但無法理解為什么會發生這種情況。 任何幫助表示贊賞。
[Win32Exception (0x80004005): The wait operation timed out]
我最近正在處理的頁面是itemediting.aspx:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="itemediting.aspx.cs" Inherits="admin_itemediting" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>elmtree - Admin</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" />
<!-- Optional theme -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap-theme.min.css" />
<!-- Latest compiled and minified JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="../styles/mylist.css" />
</head>
<body>
<form id="form1" runat="server">
<img src="images/ELleft.png" style="width:226px; height:52px; margin-top: 3px; margin-left: 17px; text-align: justify; float: none;"/></a></li>
<div class="container">
<h1> Item Edit </h1> </div>
<div class="container">
<div class="form-group">
<label class="col-sm-2 control-label">Item name: </label>
<div class="col-md-4">
<asp:TextBox ID="itemnametext" runat="server" Text="" CssClass="form-control">
</asp:TextBox>
</div>
<div class="pull-right">
<asp:Button CssClass="btn btn-primary btn-lg" ID="updatebutton" role="button" runat="server" Text="save" OnClick="updatebutton_Click" />
</div>
</div>
</div>
</form>
</body>
</html>
背后的代碼:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI.WebControls;
using System.IO;
using System.Data;
using System.Data.SqlClient;
using System.Web.Configuration;
public partial class admin_itemediting : System.Web.UI.Page{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
int row = 0;
if (Request.QueryString["itemID"] != null)
{
row = int.Parse(Request.QueryString["itemID"]);
}
else
{
Response.Redirect("itemedit.aspx");
}
}
string connectionString = WebConfigurationManager.ConnectionStrings
["ConnectionString"].ConnectionString;
SqlConnection myConnection = new SqlConnection(connectionString);
myConnection.Open();
string query = "SELECT * FROM reports WHERE ID=@rowid";
SqlCommand myCommand = new SqlCommand(query, myConnection);
myCommand.Parameters.AddWithValue("@rowid", row);
SqlDataReader rdr = myCommand.ExecuteReader();
while (rdr.Read())
{
string myname = rdr["itemname"].ToString();
itemnametext.Text = myname;
}
}
protected void updatebutton_Click(object sender, EventArgs e){
string connectionString = WebConfigurationManager.ConnectionStrings ["ConnectionString"].ConnectionString;
SqlConnection myConnection = new SqlConnection(connectionString);
myConnection.Open();
string itemnametextupdate = itemnametext.Text;
string query = "UPDATE reports SET itemname = @itemnewname";
SqlCommand myCommand = new SqlCommand(query, myConnection);
myCommand.Parameters.AddWithValue("@itemnewname", itemnametextupdate);
myCommand.ExecuteNonQuery();
myConnection.Close();
Response.Redirect("updateimage.aspx");
}
public object row { get; set; }
}
只是一個建議。
if (!IsPostBack)
{
int row = 0;
if (Request.QueryString["itemID"] != null)
{
row = int.Parse(Request.QueryString["itemID"]);
}
else
{
// here even if you make redirect the code continue to run
// and you do not know whats going on then... a call to db and a redirect.
Response.Redirect("itemedit.aspx");
// so here add a return;
return;
}
}
下一個可能的錯誤是,回發時該row
未保存在viewstate上,而是采用默認值。 使您的row
變量為:
int cRow
{
set
{
ViewState["cRow"] = value;
}
get
{
if (ViewState["cRow"] != null)
return Convert.ToInt32(ViewState["cRow"]);
else
return -1;
}
}
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