asp.net问题，马上给分

bue 2003-08-07 02:42:02

“/Ws”应用程序中的服务器错误。
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找不到文件或程序集名称“System.Data”，或找不到它的一个依赖项。
说明: 执行当前 Web 请求期间，出现未处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。

异常详细信息: System.IO.FileNotFoundException: 找不到文件或程序集名称“System.Data”，或找不到它的一个依赖项。

源错误:

执行当前 Web 请求期间生成了未处理的异常。可以使用下面的异常堆栈跟踪信息确定有关异常原因和发生位置的信息。

程序集加载跟踪: 下列信息有助于确定程序集“System.Data”无法加载的原因。

=== Pre-bind state information ===
LOG: DisplayName = System.Data, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
(Fully-specified)
LOG: Appbase = file:///d:/inetpub/wwwroot/Ws
LOG: Initial PrivatePath = bin
Calling assembly : (Unknown).
===

LOG: Publisher policy file is not found.
LOG: No redirect found in host configuration file (D:\WINNT\Microsoft.NET\Framework\v1.0.3705\aspnet.config).
LOG: Using machine configuration file from D:\WINNT\Microsoft.NET\Framework\v1.0.3705\config\machine.config.
LOG: Post-policy reference: System.Data, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
LOG: Attempting download of new URL file:///D:/WINNT/Microsoft.NET/Framework/v1.0.3705/Temporary ASP.NET Files/ws/6a6b2090/15c30320/System.Data.DLL.
LOG: Attempting download of new URL file:///D:/WINNT/Microsoft.NET/Framework/v1.0.3705/Temporary ASP.NET Files/ws/6a6b2090/15c30320/System.Data/System.Data.DLL.
LOG: Attempting download of new URL file:///d:/inetpub/wwwroot/Ws/bin/System.Data.DLL.
LOG: Attempting download of new URL file:///d:/inetpub/wwwroot/Ws/bin/System.Data/System.Data.DLL.
LOG: Attempting download of new URL file:///D:/WINNT/Microsoft.NET/Framework/v1.0.3705/Temporary ASP.NET Files/ws/6a6b2090/15c30320/System.Data.EXE.
LOG: Attempting download of new URL file:///D:/WINNT/Microsoft.NET/Framework/v1.0.3705/Temporary ASP.NET Files/ws/6a6b2090/15c30320/System.Data/System.Data.EXE.
LOG: Attempting download of new URL file:///d:/inetpub/wwwroot/Ws/bin/System.Data.EXE.
LOG: Attempting download of new URL file:///d:/inetpub/wwwroot/Ws/bin/System.Data/System.Data.EXE.

堆栈跟踪:

[FileNotFoundException: 找不到文件或程序集名称“System.Data”，或找不到它的一个依赖项。]
WebOCRM.Employee.Employee.Login(String strUserName, String strPassWord) +0
WebOCRM.WebForm1.Btlogin_Click(Object sender, EventArgs e) +63
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +108
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +57
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +18
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33
System.Web.UI.Page.ProcessRequestMain() +1263

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版本信息: Microsoft .NET 框架版本:1.0.3705.0; ASP.NET 版本:1.0.3705.0

请问这个是什么错误，谢谢大侠

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