asp.net – 下拉列表和字段验证引起了骚乱

< asp：DropDownList ID =“ddlTypeList”runat =“server”DataSourceID =“ods_TypeOptions”DataTextField =“name”DataValueField =“id”SelectedValue ='<％#Bind(“Type”)％>‘ AppendDataBoundItems = “真” >
< asp：ListItem Text =“ - ”Value =“ - 1”Selected =“True”>< / asp：ListItem>
< / ASP：DropDownList的>

下拉列表具有很好的值,包括初始虚拟.

也不

< asp：RequiredFieldValidator ID =“rfw”runat =“server”ControlToValidate =“ddlTypeList”
?InitialValue =“ – 1”ToolTip =“Required”> *< / asp：RequiredFieldValidator>

也不

< asp：CompareValidator ID =“cv”runat =“server”ControlToValidate =“ddlTypeList”ValueToCompare =“ - 1”Operator =“NotEqual”ToolTip =“Required”> *< / asp：CompareValidator>

举起任何标语说“嘿 – 你搞砸了,去解决它”.对于所有的谷歌,搜索,评论,摇摆大锤,我还没有发现我做错了什么.

我只想要一个解决方案来解决所有问题.

哦,是的,我还在DDL,RFV / CV和按钮之间有一个ValidationGroup =“myGroup”.没运气.