ImageButton.ValidationGroup 属性

  • 参考

定义

命名空间:
System.Web.UI.WebControls
程序集:
System.Web.dll

获取或设置在 ImageButton 控件回发到服务器时导致验证的控件组。

public:
 virtual property System::String ^ ValidationGroup { System::String ^ get(); void set(System::String ^ value); };
[System.Web.UI.Themeable(false)]
public virtual string ValidationGroup { get; set; }
[<System.Web.UI.Themeable(false)>]
member this.ValidationGroup : string with get, set
Public Overridable Property ValidationGroup As String

属性值

String

在 ImageButton 控件回发到服务器时导致验证的控件组。 默认值为空字符串 ("")。

实现

ValidationGroup
属性
ThemeableAttribute

示例

下面的代码示例演示如何使用 ValidationGroup 属性来指定控件在控件发回服务器时 ImageButton 要验证的控件。 该页包含三个用于捕获用户数据的文本框和三 RequiredFieldValidator 个控件，以确保用户不会将文本框留空。 RequiredFieldValidator前两个文本框的控件位于验证组中，PersonalInfoGroupRequiredFieldValidator第三个文本框的控件位于LocationInfoGroup验证组中。 单击 时 ImageButton1 ，仅验证验证组中 PersonalInfoGroup 的控件。 单击 时 ImageButton2 ，仅验证验证组中 LocationInfoGroup 的控件。

<%@ page language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="head1" runat="server">
  <title>ImageButton.ValidationGroup Example</title>
</head>
<body>
  <form id="form1" runat="server">
  
    <h3>ImageButton.ValidationGroup Example</h3>

    <asp:label id="NameLabel" 
      text="Enter your name:"
      runat="Server"
      AssociatedControlID="NameTextBox">
    </asp:label>

    &nbsp
    
    <asp:textbox id="NameTextBox" 
      runat="Server">
    </asp:textbox>

    &nbsp

    <asp:requiredfieldvalidator id="RequiredFieldValidator1"
      controltovalidate="NameTextBox"
      validationgroup="PersonalInfoGroup"
      errormessage="Enter your name."
      runat="Server">
    </asp:requiredfieldvalidator>
    
    <br /><br />
    
    <asp:label id="AgeLabel" 
      text="Enter your age:"
      runat="Server"
      AssociatedControlID="AgeTextBox">
    </asp:label>

    &nbsp
    
    <asp:textbox id="AgeTextBox" 
      runat="Server">
    </asp:textbox>

    &nbsp

    <asp:requiredfieldvalidator id="RequiredFieldValidator2"
      controltovalidate="AgeTextBox"
      validationgroup="PersonalInfoGroup"
      errormessage="Enter your age."
      runat="Server">
    </asp:requiredfieldvalidator>
    
    <br /><br />

    <!--When ImageButton1 is clicked, only validation
    controls that are a part of PersonalInfoGroup
    are validated.-->
    <asp:imagebutton id="ImageButton1" 
      alternatetext="Validate PersonalInfoGroup controls" 
      imageurl="Images/ImageButton1.JPG"
      causesvalidation="true"
      validationgroup="PersonalInfoGroup"
      runat="Server" />
      
    <br /><br />
      
    <asp:label id="CityLabel" 
      text="Enter your city of residence:"
      runat="Server"
      AssociatedControlID="CityTextBox">
    </asp:label>

    &nbsp
    
    <asp:textbox id="CityTextBox" 
      runat="Server">
    </asp:textbox>

    &nbsp

    <asp:requiredfieldvalidator id="RequiredFieldValidator3"
      controltovalidate="CityTextBox"
      validationgroup="LocationInfoGroup"
      errormessage="Enter a city name."
      runat="Server">
    </asp:requiredfieldvalidator>
    
    <br /><br />

    <!--When ImageButton2 is clicked, only validation
    controls that are a part of LocationInfoGroup
    are validated.-->
    <asp:imagebutton id="ImageButton2" 
      alternatetext="Validate LocationInfoGroup controls" 
      imageUrl="Images/ImageButton2.JPG"
      causesvalidation="true"
      validationgroup="LocationInfoGroup"
      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">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="head1" runat="server">
  <title>ImageButton.ValidationGroup Example</title>
</head>
<body>
  <form id="form1" runat="server">
  
    <h3>ImageButton.ValidationGroup Example</h3>

    <asp:label id="NameLabel" 
      text="Enter your name:"
      runat="Server" AssociatedControlID="NameTextBox">
    </asp:label>

    &nbsp
    
    <asp:textbox id="NameTextBox" 
      runat="Server">
    </asp:textbox>

    &nbsp

    <asp:requiredfieldvalidator id="RequiredFieldValidator1"
      controltovalidate="NameTextBox"
      validationgroup="PersonalInfoGroup"
      errormessage="Enter your name."
      runat="Server">
    </asp:requiredfieldvalidator>
    
    <br /><br />
    
    <asp:label id="AgeLabel" 
      text="Enter your age:"
      runat="Server"
      AssociatedControlID="AgeTextBox">
    </asp:label>

    &nbsp
    
    <asp:textbox id="AgeTextBox" 
      runat="Server">
    </asp:textbox>

    &nbsp

    <asp:requiredfieldvalidator id="RequiredFieldValidator2"
      controltovalidate="AgeTextBox"
      validationgroup="PersonalInfoGroup"
      errormessage="Enter your age."
      runat="Server">
    </asp:requiredfieldvalidator>
    
    <br /><br />

    <!--When ImageButton1 is clicked, only validation
    controls that are a part of PersonalInfoGroup
    are validated.-->
    <asp:imagebutton id="ImageButton1" 
      alternatetext="Validate PersonalInfoGroup controls" 
      imageurl="Images/ImageButton1.JPG"
      causesvalidation="true"
      validationgroup="PersonalInfoGroup"
      runat="Server" />
      
    <br /><br />
      
    <asp:label id="CityLabel" 
      text="Enter your city of residence:"
      runat="Server"
      AssociatedControlID="CityTextBox">
    </asp:label>

    &nbsp
    
    <asp:textbox id="CityTextBox" 
      runat="Server">
    </asp:textbox>

    &nbsp

    <asp:requiredfieldvalidator id="RequiredFieldValidator3"
      controltovalidate="CityTextBox"
      validationgroup="LocationInfoGroup"
      errormessage="Enter a city name."
      runat="Server">
    </asp:requiredfieldvalidator>
    
    <br /><br />

    <!--When ImageButton2 is clicked, only validation
    controls that are a part of LocationInfoGroup
    are validated.-->
    <asp:imagebutton id="ImageButton2" 
      alternatetext="Validate LocationInfoGroup controls" 
      imageUrl="Images/ImageButton2.JPG"
      causesvalidation="true"
      validationgroup="LocationInfoGroup"
      runat="Server" />

  </form>
</body>
</html>

注解

通过验证组，可以将页面上的验证控件分配给特定类别。 每个验证组都可以独立于页面上的其他验证组进行验证。 ValidationGroup使用 属性可以指定控件在发回服务器时导致验证的验证组ImageButton的名称。 仅当 属性的值设置为 true时，CausesValidation此属性才有效。 为 ValidationGroup 属性指定值时，当控件回发到服务器时 ImageButton ，仅验证属于指定组的验证控件。 如果未为此属性指定值，并且 属性 CausesValidation 设置为 true，则当控件发回服务器时，将验证页面上未分配给验证组的所有验证控件。

无法通过主题或样式表主题设置此属性。 有关详细信息，请参阅 ThemeableAttribute 和 ASP.NET 主题和皮肤。

适用于

另请参阅