HtmlButton.ValidationGroup 屬性
定義
重要
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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, setPublic Overridable Property ValidationGroup As String屬性值
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。
