覆盖asp.net ValidationSummary控件错误消息

Question

How can I override the error message displayed by the ValidationSummary control in an ASP.NET web forms project?

Rather than displaying an error for each invalid control within the validation group, I want to display a single message eg "Invalid form".

Answer 1

 <%: Html.ValidationSummary(true, "Invalid form") %>

Answer 2

You can try setting ValidationSummary.HeaderText (and clearing the error messages for each validatior), or just create a new CustomValidator when validation fails.

private void DisplayCustomMessageInValidationSummary(string message) 
      {
            CustomValidator CustomValidatorCtrl = new CustomValidator();
            CustomValidatorCtrl.IsValid = false;
            CustomValidatorCtrl.ErrorMessage = message;
            this.Page.Controls.Add(CustomValidatorCtrl);
      } 

Answer 3

除了使用asp验证外，您还可以在后面的代码中进行验证，如果不满足填写表格的条件，则可以将错误消息放入空白标签中，如下所示

lblErrorMessage.Text = "<span style='color:red;'>Invalid form</span>"