Question

尝试在我的网站上打开一个网页而不是整个网页时出错。我一直在做的两个页面如下。它们适用于允许管理员编辑网站上的项目。真的需要帮助。堆栈跟踪：

[Win32Exception (0x80004005): The wait operation timed out]

[SqlException (0x80131904): A connection was successfully established with the server, but then an error occurred during the pre-login handshake. (provider: SSL Provider, error: 0 - The wait operation timed out.)]
   System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) +6568558
   System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) +717
   System.Data.SqlClient.TdsParser.ConsumePreLoginHandshake(Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, Boolean& marsCapable) +1730
   System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, Boolean withFailover) +693
   System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, Boolean withFailover) +219
   System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString connectionOptions, SqlCredential credential, TimeoutTimer timeout) +6597311
   System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance) +6597891
   System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData) +942
   System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions) +1162
   System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions) +72
   System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) +6601145
   System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) +103
   System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection) +2102
   System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) +116
   System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) +1079
   System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) +6605639
   System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry) +233
   System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry) +278
   System.Data.SqlClient.SqlConnection.Open() +239
   System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) +292
   System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) +420
   System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, String srcTable) +277
   System.Web.UI.WebControls.SqlDataSourceView.ExecuteSelect(DataSourceSelectArguments arguments) +3326091
   System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +28
   System.Web.UI.WebControls.DataBoundControl.PerformSelect() +313
   System.Web.UI.WebControls.ListView.PerformSelect() +124
   System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound() +146
   System.Web.UI.WebControls.ListView.CreateChildControls() +80
   System.Web.UI.Control.EnsureChildControls() +189
   System.Web.UI.Control.PreRenderRecursiveInternal() +60
   System.Web.UI.Control.PreRenderRecursiveInternal() +222
   System.Web.UI.Control.PreRenderRecursiveInternal() +222
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4297

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>

itemediting.aspx.cs：

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; }
}

Answer 1

正如@mason所提到的，当你完成实现Dispose()的内容时，你必须确保给IDisposable打电话。

更改处理SqlConnection，SqlCommand和SqlDataReader的代码：

string query = "SELECT * FROM reports WHERE ID=@rowid";  

using (SqlConnection myConnection = new SqlConnection(connectionString))
using (SqlCommand myCommand = new SqlCommand(query, myConnection))
{
    myCommand.Parameters.AddWithValue("@rowid", row);    
    myConnection.Open();   

    using (SqlDataReader rdr = myCommand.ExecuteReader())
    {
        while (rdr.Read())
        {
            string myname = rdr["itemname"].ToString();    
            itemnametext.Text = myname;
        }
    }
}

等待操作超时了ASP.NET

1 个答案: