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HtmlInputButton.ValidationGroup 屬性

定義

取得或設定控制項群組,HtmlInputButton 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

控制項群組,HtmlInputButton 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 HtmlInputButton 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 CityInfoGroupRequiredFieldValidator 而第二個方塊的控件位於驗證群組中 StateInfoGroupCityQueryButton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 (((HtmlInputButton)sender).ID)
    {

      case "CityQueryButton":

        // Take the appropriate action if the controls pass validation. 
        if (CityReqValidator.IsValid)
        {
          Message.InnerHtml = "You have chosen to run a query for the following city: " +
             CityTextBox.Value;
        }

        break;

      case "StateQueryButton":

        // Take the appropriate action if the controls pass validation.
        if (StateReqValidator.IsValid)
        {
          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>HtmlInputButton ValidationGroup Example</title>
</head>

<body>

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

      <h3> HtmlInputButton 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="<br />Please enter a city."
                    Display="Dynamic"
                    EnableClientScript="False"
                    runat="server"/>
            </td>
            <td valign="bottom">
               <input id="CityQueryButton"
                      type="Submit"
                      value="Submit"
                      causesvalidation="True"
                      validationgroup="CityInfoGroup" 
                      onserverclick="SubmitButton_Click"
                      runat="server"/>
            </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="<br />Please enter a state."
                    Display="Dynamic"
                    EnableClientScript="False"
                    runat="server"/>
            </td>
            <td valign="bottom">
               <input id="StateQueryButton"
                      type="Submit"
                      value="Submit"
                      causesvalidation="True"
                      validationgroup="StateInfoGroup"
                      onserverclick="SubmitButton_Click"
                      runat="server"/>
            </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, HtmlInputButton)).ID

      Case "CityQueryButton"

        ' Take the appropriate action if the controls pass validation. 
        If CityReqValidator.IsValid Then
           
          Message.InnerHtml = "You have chosen to run a query for the following city: " & _
             CityTextBox.Value
               
        End If

      Case "StateQueryButton"

        ' Take the appropriate action if the controls pass validation.
        If StateReqValidator.IsValid Then
               
          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>HtmlInputButton ValidationGroup Example</title>
</head>

<body>
   <form id="form1" runat="server">
      <h3> HtmlInputButton 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="<br />Please enter a city."
                    Display="Dynamic"
                    EnableClientScript="False"
                    runat="server"/>
            </td>
            <td valign="bottom">
               <input id="CityQueryButton"
                      type="Submit"
                      value="Submit"
                      causesvalidation="True"
                      validationgroup="CityInfoGroup"
                      onserverclick="SubmitButton_Click"
                      runat="server"/>
            </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="<br />Please enter a state."
                    Display="Dynamic"
                    EnableClientScript="False"
                    runat="server"/>
            </td>
            <td valign="bottom">
               <input id="StateQueryButton"
                      type="Submit"
                      value="Submit"
                      causesvalidation="True"
                      validationgroup="StateInfoGroup"
                      onserverclick="SubmitButton_Click"
                      runat="server"/>
            </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HtmlInputButton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 HtmlInputButton ,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

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