服务器端验证不起作用？ [英] server side validation does not work?

问题描述

 <   asp：TextBox     ID   =  txttodt     runat   =  server    BorderColor   = ＃8F7591    BorderWidth   =  1px    CssClass   =  txtinput    BorderStyle   = 实体    BackColor   = ＃F4F4F4    onkeyup   =  KeyRemover（this）    onpaste   = 返回false >  <   / asp：TextBox  >  
 
 <   asp：CustomValidator     id  < span class =code-keyword> =  cvtxttodt    runat   =  server     ControlToValidate   = < span class =code-keyword> txttodt      OnServerValidate     =  Validatetxttodt     CssClass   = < span class =code-keyword> Validation_Error    ErrorMessage   = 输入日期    ForeColor   =  WhiteSmoke    ValidationGroup   =  NTST    /  >  
 
 <   asp：按钮    ID   =  btnprtNTST    runat   =  server   < span class =code-attribute>宽度  =  80px   字体粗体  =  true   文字  = 提交    ValidationGroup   =  NTST    CssClass   =  button < span class =code-attribute>   /  >  

  Sub  Validatetxttodt（ ByVal 发​​件人作为 对象， ByVal  args  As  ServerValidateEventArgs）
 尝试 
 如果（txttodt.Text =   ）然后 
 args.IsValid =  False  
 否则 
 args.IsValid =  True  
 结束 如果 
 
  Catch  ex  As 例外
 args.IsValid = 错误 
 结束 尝试 
 结束  Sub  

不工作？控制在调试时没有捕获sub？

解决方案

hi，



设置属性

 ValidateEmptyText =   true 

txttodt.Text 的价值是多少？



你只测试一下等于 String.Empty 。但是如果 txttodt.Text 是 Nothing 怎么办？



更好的方法是：

  Sub  Validatetxttodt（ ByVal  sender 作为 对象， ByVal  args  As  ServerValidateEventArgs）
 尝试 
 如果（ String  .IsNullOrEmpty（txttodt.Text））然后 
 args.IsValid = 错误 
 其他 
 args.IsValid =  True  
 结束 如果 
  Catch  ex 作为例外
 args.IsValid = 错误 
 结束 尝试 
 结束  Sub  

但它没有解决 Sub 未执行的问题...

<asp:TextBox ID="txttodt" runat="server" BorderColor="#8F7591" BorderWidth="1px" CssClass="txtinput" BorderStyle="Solid" BackColor="#F4F4F4" onkeyup="KeyRemover(this)" onpaste="return false"></asp:TextBox>

<asp:CustomValidator id="cvtxttodt" runat="server" ControlToValidate="txttodt"  OnServerValidate ="Validatetxttodt" CssClass="Validation_Error" ErrorMessage="enter date" ForeColor="WhiteSmoke" ValidationGroup="NTST" />

<asp:Button ID="btnprtNTST" runat="server" Width="80px" Font-Bold="true" Text="Submit" ValidationGroup="NTST" CssClass="button" />

Sub Validatetxttodt(ByVal sender As Object, ByVal args As ServerValidateEventArgs)
   Try
      If (txttodt.Text = "") Then
         args.IsValid = False
      Else
         args.IsValid = True
      End If

   Catch ex As Exception
      args.IsValid = False
   End Try
End Sub

not working ? control does not catch sub at debug time?

解决方案

hi,

Set property

ValidateEmptyText="true"

for custom validator

What is the value of txttodt.Text ?

You only test for equality to String.Empty. But what if txttodt.Text is Nothing ?

A better way would be :

Sub Validatetxttodt(ByVal sender As Object, ByVal args As ServerValidateEventArgs)
   Try
      If (String.IsNullOrEmpty(txttodt.Text)) Then
         args.IsValid = False
      Else
         args.IsValid = True
      End If
   Catch ex As Exception
      args.IsValid = False
   End Try
End Sub

But it doesn''t solve the problem of the Sub not being executed...

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