HtmlButton.ValidationGroup 屬性

參考

定義

命名空間:: System.Web.UI.HtmlControls

組件:: System.Web.dll

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

取得或設定控制項群組，HtmlButton 會在回傳至伺服器時，針對這個群組進行驗證。

public:
 virtual property System::String ^ ValidationGroup { System::String ^ get(); void set(System::String ^ value); };

public virtual string ValidationGroup { get; set; }

member this.ValidationGroup : string with get, set

Public Overridable Property ValidationGroup As String

屬性值

String

控制項群組，HtmlButton 控制項會在回傳至伺服器時，針對這個群組進行驗證。預設值是空字串 ("")，表示未設定這個屬性。

範例

下列程式代碼範例示範如何使用 ValidationGroup 屬性來指定控制項在控件回傳至伺服器時 HtmlButton 驗證的控制件。頁面包含兩個文本框，可從使用者擷取數據，以及兩 RequiredFieldValidator 個控件，以確保使用者不會將文本框保留空白。第 RequiredFieldValidator 一個文本框的控件位於驗證群組中 CityInfoGroup ， RequiredFieldValidator 而第二個方塊的控件位於驗證群組中 StateInfoGroup 。 CityQueryButton按兩下時，只會驗證驗證群組中的CityInfoGroup控制件。 StateQueryButton按兩下時，只會驗證驗證群組中的StateInfoGroup控制件。

<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  void SubmitButton_Click(Object sender, EventArgs e)
  {
    // Determine which button was clicked.
    switch (((HtmlButton)sender).ID)
    {
        
      case "CityQueryButton":

          if (CityReqValidator.IsValid)
          {
              // Indicate that the city query was selected.
              Message.InnerHtml = "You have chosen to run a query for the following city: " +
                                  CityTextBox.Value;
          }
        
        break;
        
      case "StateQueryButton":

          if (StateReqValidator.IsValid)
          {
              // Indicate that the state query was selected.
              Message.InnerHtml = "You have chosen to run a query for the following state: " +
                                  StateTextBox.Value;
          }
        break;
        
      default:
        
        // If the button clicked is not recognized, erase the message on the page. 
        Message.InnerHtml = "";
        
        break;
        
    }
    
  }
</script>

<html xmlns="http://www.w3.org/1999/xhtml"  >

<head runat="server">
    <title>HtmlButton ValidationGroup Example</title>
</head>
<body>
    <form id="form1" runat="server">    
    
        <h3>HtmlButton ValidationGroup Example</h3>   
         
      <table border="1" cellpadding="10">
         <tr>
            <td>
               <b>Enter city to query.</b> <br />
               
               <input id="CityTextBox" 
                      type="Text"
                      runat="server"/>
                      
               <asp:RequiredFieldValidator 
                      ID="CityReqValidator"
                      ControlToValidate="CityTextBox" 
                      ValidationGroup="CityInfoGroup" 
                      ErrorMessage="Please enter a city."
                      Display="Dynamic"
                      EnableClientScript="False"
                      runat="server"/>
                    
            </td>
            <td valign="bottom">
            
               <button id="CityQueryButton"
                       causesvalidation="True" 
                       validationgroup="CityInfoGroup" 
                       onserverclick="SubmitButton_Click"
                       runat="server">
                       Submit
               </button>
               
            </td>
         </tr>

         <tr>
            <td>
               <b>Enter state to query.</b> <br />
               
               <input id="StateTextBox" 
                      type="Text" 
                      runat="server"/>
               <asp:RequiredFieldValidator 
                      ID="StateReqValidator"
                      ControlToValidate="StateTextBox" 
                      ValidationGroup="StateInfoGroup"
                      ErrorMessage="Please enter a state."
                      Display="Dynamic"
                      EnableClientScript="False"
                      runat="server"/>
                      
            </td>
            <td valign="bottom">
            
               <button id="StateQueryButton"
                       causesvalidation="True"
                       validationgroup="StateInfoGroup"
                       onserverclick="SubmitButton_Click"
                       runat="server">
                       Submit
               </button>
               
            </td>
         </tr>

      </table>

      <br /><br />

      <span id="Message"
            runat="Server"/>
    </form>
    
</body>

</html>

<%@ Page Language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
  Sub SubmitButton_Click(ByVal sender As Object, ByVal e As EventArgs)
    
    ' Determine which button was clicked.
    Select Case (CType(sender, HtmlButton)).ID
      
      Case "CityQueryButton"
        
                If (CityReqValidator.IsValid) Then
                    ' Indicate that the city query was selected.
                    Message.InnerHtml = "You have chosen to run a query for the following city: " & _
                                        CityTextBox.Value
                End If
                
            Case "StateQueryButton"
        
                If (StateReqValidator.IsValid) Then
                    ' Indicate that the state query was selected.
                    Message.InnerHtml = "You have chosen to run a query for the following state: " & _
                                        StateTextBox.Value
                End If
                
            Case Else
        
                ' If the button clicked is not recognized, erase the message on the page.
                Message.InnerHtml = ""
        
        
        End Select
    
  End Sub
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >

<head runat="server">
    <title> HtmlButton CausesValidation Example </title>
</head>
<body>

    <form id="form1" runat="server">

      <h3> HtmlButton CausesValidation Example </h3>

      <table border="1" cellpadding="10">
         <tr>
            <td>
            
               <b>Enter city to query.</b> <br />
            
               <input id="CityTextBox" 
                      type="Text"
                      runat="server"/>
            
               <asp:RequiredFieldValidator 
                      ID="CityReqValidator"
                      ControlToValidate="CityTextBox"
                      ValidationGroup="CityInfoGroup"
                      ErrorMessage="Please enter a city."
                      Display="Dynamic"
                      EnableClientScript="False"
                      runat="server"/>
            </td>
            <td valign="bottom">
            
               <button id="CityQueryButton"
                       causesvalidation="True" 
                       validationgroup="CityInfoGroup"
                       onserverclick="SubmitButton_Click"
                       runat="server">
                       Submit
               </button>
               
            </td>
         </tr>

         <tr>
            <td>
               
               <b>Enter state to query.</b> <br />
               
               <input id="StateTextBox" 
                      type="Text" 
                      runat="server"/>
                      
               <asp:RequiredFieldValidator 
                      ID="StateReqValidator"
                      ControlToValidate="StateTextBox" 
                      ValidationGroup="StateInfoGroup"
                      ErrorMessage="Please enter a state."
                      Display="Dynamic"
                      EnableClientScript="False"
                      runat="server"/>
                      
            </td>
            <td valign="bottom">
            
               <button id="StateQueryButton"
                       causesvalidation="True"
                       validationgroup="StateInfoGroup"
                       onserverclick="SubmitButton_Click"
                       runat="server">
                       Submit
               </button>
               
            </td>
         </tr>

      </table>

      <br /><br />

      <span id="Message"
            runat="Server"/>
    </form>
    
</body>

</html>

備註

驗證群組可讓您將頁面上的驗證控件指派給特定類別。每個驗證群組都可以獨立於頁面上的其他驗證群組進行驗證。 ValidationGroup使用屬性可指定控制項在回傳至伺服器時造成驗證的驗證組HtmlButton名。

只有當屬性的值設定為 true時，CausesValidation這個屬性才會生效。當您指定屬性的值 ValidationGroup 時，只有在控件回傳至伺服器時 HtmlButton ，才會驗證屬於指定群組一部分的驗證控件。如果您未指定這個屬性的值，而且 CausesValidation 屬性設定為 true，則控件回傳至伺服器時，會驗證頁面上未指派給驗證群組的所有驗證控件。

適用於

共用方式為

HtmlButton.ValidationGroup 屬性

定義

屬性值

範例

備註

適用於

另請參閱

意見反應

其他資源