找不到您的ObjectDataSource1，共振可能是
1)ObjectDataSource1标记中存在一些语法错误，该语法错误无法解析并且无法创建控件对象.
2)您已将其从aspx标记页中删除.
3)@Page指令中的类文件名后面的代码不正确(请使用名称空间检查)

验证代码是否可以解决:)

Your ObjectDataSource1 is not found, reson could be
1) there is some syntax error in your ObjectDataSource1 markup, which is not parsing and not able yo create a control object.
2) you have removed it from your aspx markup page.
3) codebehind class file name in the @Page directive is not propper (check with namespace)

verify your code for solution :)

通过为用作TypeName的类提供完全指定的名称空间来尝试..

即namespace.namespace ....(.)className

我认为您可能提供了无效的类，或者名称空间跟踪不适用于您要指向的确切类.

try by providing fully specified namespace for the class you are using as TypeName..

i.e namespace.namespace.... (.)className

i think you are maybe providing invalid class or the namespace track is not proper to exact class you are trying to point to.