Visual studio 2008 RDLC报表在设计状态时，工具箱中的报表项（文本框、折线图、表、子报表等）竟然消失了，打补丁，重装VS都没有解决。
他妈的折腾了一个下午，都快无语了。偶然看见一哥们也遇到这问题，国外网址：http://stackoverflow.com/questions/799934/toolbox-issue-for-rdlc-in-design-mode-vs2008
先调把隐藏文件显示，然后在
C:\Documents and Settings\你的电脑用户名\Local Settings\Application Data\Microsoft\VisualStudio\9.0
toolbox.tbd
toolbox_reset.tbd
toolboxIndex.tbd
toolboxIndex_reset.tbd
把这4个隐藏文件干掉就OK了
原文
fixed this by going into my profile as follows:
C:\Documents and Settings\MYUSERNAME\Local Settings\Application Data\Microsoft\VisualStudio\9.0
toolbox.tbd
toolbox_reset.tbd
toolboxIndex.tbd
toolboxIndex_reset.tbd
There are four HIDDEN files in there that make up what is apparently the toolbox cache. If you erase them, they will be re-generated and #13119 will go back to General. As I said, these files appear to be hidden so configure the file explorer accordingly.