显示此代码中的错误....需要帮助 [英] shows error in this code ....help required

问题描述

朋友们，



我的代码收到错误..

Hi Friends,

am getting error in this code..

Object reference not set to an instance of an object.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

< img src =Images /<％Response.Write（Request.QueryString [typ]。ToString（））;％> .jpgwidth = 200pxheight =60pxalt =/>



请帮助，谢谢...

<img src="Images/<%Response.Write(Request.QueryString["typ"].ToString()); %>.jpg" width="200px" height="60px" alt=""/>

Please help, Thanks...

推荐答案

检查Request.QueryString [typ]在使用它之前是null。



或者尝试处理空值如

Check whether Request.QueryString["typ"] is null before using it.

Or try to handle the null like

Response.Write( Convert.ToString(Request.QueryString["typ"]))

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