Page.IsPostBack 属性 [C#] 获取一个值,该值指示该页是否正为响应客户端回发而加载,或者它是否正被首次加载和访问。[Visual Basic] Public ReadOnly Property IsPostBack As Boolean [C#] public bool IsPostBack {get;} [C++] public: __property bool get_IsPostBack(); [JScript] public function get IsPostBack() : Boolean; 属性值 如果是为响应客户端回发而加载该页,则为 true;否则为 false。示例 [Visual Basic, C#, JScript] 下面的示例测试 IsPostBack 属性的值以在加载了 Page 时按条件为所有验证服务器控件调用 Page.Validate 方法。[Visual Basic] Sub Page_Load If Not IsPostBack ' Validate initially to force the asterisks ' to appear before the first roundtrip. Validate() End If End Sub [C#] void Page_Load() { if (!IsPostBack) { // Validate initially to force asterisks // to appear before the first roundtrip. Validate(); } } [JScript] function Page_Load() { if (!IsPostBack) { // Validate initially to force the asterisks // to appear before the first roundtrip. Validate(); } } [C++] 没有可用于 C++ 的示例。若要查看 Visual Basic、C# 或 JScript 示例,请单击页左上角的语言筛选器按钮 。要求 平台: Windows 2000, Windows XP Professional, Windows .NET Server family
获取一个值,该值指示该页是否正为响应客户端回发而加载,或者它是否正被首次加载和访问。[Visual Basic] Public ReadOnly Property IsPostBack As Boolean [C#] public bool IsPostBack {get;} [C++] public: __property bool get_IsPostBack(); [JScript] public function get IsPostBack() : Boolean; 属性值 如果是为响应客户端回发而加载该页,则为 true;否则为 false。示例 [Visual Basic, C#, JScript] 下面的示例测试 IsPostBack 属性的值以在加载了 Page 时按条件为所有验证服务器控件调用 Page.Validate 方法。[Visual Basic] Sub Page_Load If Not IsPostBack ' Validate initially to force the asterisks ' to appear before the first roundtrip. Validate() End If End Sub [C#] void Page_Load() { if (!IsPostBack) { // Validate initially to force asterisks // to appear before the first roundtrip. Validate(); } } [JScript] function Page_Load() { if (!IsPostBack) { // Validate initially to force the asterisks // to appear before the first roundtrip. Validate(); } } [C++] 没有可用于 C++ 的示例。若要查看 Visual Basic、C# 或 JScript 示例,请单击页左上角的语言筛选器按钮 。
获取一个值,该值指示该页是否正为响应客户端回发而加载,或者它是否正被首次加载和访问。[Visual Basic]
Public ReadOnly Property IsPostBack As Boolean
[C#]
public bool IsPostBack {get;}
[C++]
public: __property bool get_IsPostBack();
[JScript]
public function get IsPostBack() : Boolean;
属性值
如果是为响应客户端回发而加载该页,则为 true;否则为 false。示例
[Visual Basic, C#, JScript] 下面的示例测试 IsPostBack 属性的值以在加载了 Page 时按条件为所有验证服务器控件调用 Page.Validate 方法。[Visual Basic]
Sub Page_Load
If Not IsPostBack
' Validate initially to force the asterisks
' to appear before the first roundtrip.
Validate()
End If
End Sub
[C#]
void Page_Load() {
if (!IsPostBack) {
// Validate initially to force asterisks
// to appear before the first roundtrip.
Validate();
}
}
[JScript]
function Page_Load() {
if (!IsPostBack) {
// Validate initially to force the asterisks
// to appear before the first roundtrip.
Validate();
}
}
[C++] 没有可用于 C++ 的示例。若要查看 Visual Basic、C# 或 JScript 示例,请单击页左上角的语言筛选器按钮 。要求
平台: Windows 2000, Windows XP Professional, Windows .NET Server family
Public ReadOnly Property IsPostBack As Boolean
[C#]
public bool IsPostBack {get;}
[C++]
public: __property bool get_IsPostBack();
[JScript]
public function get IsPostBack() : Boolean;
属性值
如果是为响应客户端回发而加载该页,则为 true;否则为 false。示例
[Visual Basic, C#, JScript] 下面的示例测试 IsPostBack 属性的值以在加载了 Page 时按条件为所有验证服务器控件调用 Page.Validate 方法。[Visual Basic]
Sub Page_Load
If Not IsPostBack
' Validate initially to force the asterisks
' to appear before the first roundtrip.
Validate()
End If
End Sub
[C#]
void Page_Load() {
if (!IsPostBack) {
// Validate initially to force asterisks
// to appear before the first roundtrip.
Validate();
}
}
[JScript]
function Page_Load() {
if (!IsPostBack) {
// Validate initially to force the asterisks
// to appear before the first roundtrip.
Validate();
}
}
[C++] 没有可用于 C++ 的示例。若要查看 Visual Basic、C# 或 JScript 示例,请单击页左上角的语言筛选器按钮 。