0
我从后面的代码中显示requiredfieldvalidator的错误消息,但显示设置为无或隐藏可见。我试图做.visible = true,但它仍然隐藏。我怎样才能让它显示错误信息?该文本框位于GridView中。从代码背后启用RequiredFieldValidator
<asp:TemplateField HeaderText="SSN">
<ItemTemplate>
<asp:TextBox ID="txtSSN" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="txtSSN" />
</ItemTemplate>
</asp:TemplateField>
TextBox txtSSN = (TextBox)r.FindControl("txtSSN");
if (txtSSN.Text == "")
{
RequiredFieldValidator RequiredFieldValidator1 = (RequiredFieldValidator)r.FindControl("RequiredFieldValidator1");
RequiredFieldValidator1.Visible = true;
RequiredFieldValidator1.Enabled = true;
RequiredFieldValidator1.ErrorMessage = "This field is required.";
}