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<?xml version="1.0" encoding="utf-8"?>
<Type Name="HiddenField" FullName="System.Web.UI.WebControls.HiddenField">
<TypeSignature Language="C#" Value="public class HiddenField : System.Web.UI.Control, System.Web.UI.IPostBackDataHandler" />
<AssemblyInfo>
<AssemblyName>System.Web</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Base>
<BaseTypeName>System.Web.UI.Control</BaseTypeName>
</Base>
<Interfaces>
<Interface>
<InterfaceName>System.Web.UI.IPostBackDataHandler</InterfaceName>
</Interface>
</Interfaces>
<Docs>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>In this topic:</para>
<list type="bullet">
<item>
<para>
<format type="text/html">
<a href="#introduction">Introduction</a>
</format>
</para>
</item>
<item>
<para>
<format type="text/html">
<a href="#declarative_syntax">Declarative Syntax</a>
</format>
</para>
</item>
</list>
<format type="text/html">
<a href="#introduction" />
</format>
<format type="text/html">
<h2>Introduction</h2>
</format>
<para>The <see cref="T:System.Web.UI.WebControls.HiddenField" /> control is used to store a value that needs to be persisted across posts to the server. It is rendered as an <input type= "hidden"/> element.</para>
<para>Normally view state, session state, and cookies are used to maintain the state of a Web Forms page. However, if these methods are disabled or are not available, you can use the <see cref="T:System.Web.UI.WebControls.HiddenField" /> control to store state values.</para>
<para>To specify the value for a <see cref="T:System.Web.UI.WebControls.HiddenField" /> control, use the <see cref="P:System.Web.UI.WebControls.HiddenField.Value" /> property. You can provide a routine that gets called every time the value of the <see cref="T:System.Web.UI.WebControls.HiddenField" /> control changes between posts to the server by creating an event handler for the <see cref="E:System.Web.UI.WebControls.HiddenField.ValueChanged" /> event.</para>
<format type="text/html">
<a href="#declarative_syntax" />
</format>
<format type="text/html">
<h2>Declarative Syntax</h2>
</format>
<code><asp:HiddenField
EnableTheming="True|<codeFeaturedElement>False</codeFeaturedElement>"
EnableViewState="<codeFeaturedElement>True</codeFeaturedElement>|False"
ID="string"
OnDataBinding="DataBinding event handler"
OnDisposed="Disposed event handler"
OnInit="Init event handler"
OnLoad="Load event handler"
OnPreRender="PreRender event handler"
OnUnload="Unload event handler"
OnValueChanged="ValueChanged event handler"
runat="server"
SkinID="string"
Value="string"
Visible="<codeFeaturedElement>True</codeFeaturedElement>|False"
/></code>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Represents a hidden field used to store a non-displayed value.</para>
</summary>
</Docs>
<Members>
<Member MemberName=".ctor">
<MemberSignature Language="C#" Value="public HiddenField ();" />
<MemberType>Constructor</MemberType>
<Parameters />
<Docs>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Use this constructor to create a new instance of a <see cref="T:System.Web.UI.WebControls.HiddenField" /> class.</para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Initializes a new instance of the <see cref="T:System.Web.UI.WebControls.HiddenField" /> class.</para>
</summary>
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName="CreateControlCollection">
<MemberSignature Language="C#" Value="protected override System.Web.UI.ControlCollection CreateControlCollection ();" />
<MemberType>Method</MemberType>
<ReturnValue>
<ReturnType>System.Web.UI.ControlCollection</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>The <see cref="M:System.Web.UI.Control.CreateControlCollection" /> method is normally used to create a <see cref="T:System.Web.UI.ControlCollection" /> object for storing the child controls of a Web Server control. In this implementation of the method, an <see cref="T:System.Web.UI.EmptyControlCollection" /> collection is always returned to indicate that child controls are not allowed.</para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Creates an <see cref="T:System.Web.UI.EmptyControlCollection" /> object used to indicate that child controls are not allowed.</para>
</summary>
<returns>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Always returns an <see cref="T:System.Web.UI.EmptyControlCollection" /> object.</para>
</returns>
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName="EnableTheming">
<MemberSignature Language="C#" Value="public override bool EnableTheming { set; get; }" />
<MemberType>Property</MemberType>
<ReturnValue>
<ReturnType>System.Boolean</ReturnType>
</ReturnValue>
<Docs>
<value>To be added.</value>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>The <see cref="T:System.Web.UI.WebControls.HiddenField" /> control does not support themes. This property has been overridden to always return false. If you attempt to set this property, a <see cref="T:System.NotSupportedException" /> exception is thrown.</para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Gets or sets a value indicating whether themes apply to this control.</para>
</summary>
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName="Focus">
<MemberSignature Language="C#" Value="public override void Focus ();" />
<MemberType>Method</MemberType>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Setting focus to a <see cref="T:System.Web.UI.WebControls.HiddenField" /> control is not supported. A <see cref="T:System.NotSupportedException" /> is thrown if you attempt to call this method.</para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Sets input focus to this control.</para>
</summary>
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName="LoadPostData">
<MemberSignature Language="C#" Value="protected virtual bool LoadPostData (string postDataKey, System.Collections.Specialized.NameValueCollection postCollection);" />
<MemberType>Method</MemberType>
<ReturnValue>
<ReturnType>System.Boolean</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="postDataKey" Type="System.String" />
<Parameter Name="postCollection" Type="System.Collections.Specialized.NameValueCollection" />
</Parameters>
<Docs>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>The Web Forms page framework tracks all the server controls that return true to this method call, then invokes the <see cref="M:System.Web.UI.WebControls.HiddenField.RaisePostDataChangedEvent" /> on those controls.</para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Processes postback data for a <see cref="T:System.Web.UI.WebControls.HiddenField" /> control.</para>
</summary>
<returns>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>true if the <see cref="T:System.Web.UI.WebControls.HiddenField" /> control's state changes as a result of the postback; otherwise, false.</para>
</returns>
<param name="postDataKey">
<attribution license="cc4" from="Microsoft" modified="false" />The key identifier for the control.</param>
<param name="postCollection">
<attribution license="cc4" from="Microsoft" modified="false" />The collection of all incoming name values.</param>
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName="OnPreRender">
<MemberSignature Language="C#" Value="protected override void OnPreRender (EventArgs e);" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="e" Type="System.EventArgs" />
</Parameters>
<Docs>
<remarks>To be added.</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Raises the <see cref="E:System.Web.UI.Control.PreRender" /> event.</para>
</summary>
<param name="e">
<attribution license="cc4" from="Microsoft" modified="false" />An <see cref="T:System.EventArgs" /> object that contains the event data.</param>
</Docs>
</Member>
<Member MemberName="OnValueChanged">
<MemberSignature Language="C#" Value="protected virtual void OnValueChanged (EventArgs e);" />
<MemberType>Method</MemberType>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="e" Type="System.EventArgs" />
</Parameters>
<Docs>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>The <see cref="E:System.Web.UI.WebControls.HiddenField.ValueChanged" /> event is raised when the value of the <see cref="T:System.Web.UI.WebControls.HiddenField" /> control changes between posts to the server. This allows you to provide an event-handling method that performs a custom routine whenever this event occurs.</para>
<para>Raising an event invokes the event handler through a delegate. For more information, see <format type="text/html"><a href="f2adaf01-1ed1-42e1-8c31-8d467e7e0ee2">Raising an Event</a></format>.</para>
<para>The <see cref="M:System.Web.UI.WebControls.HiddenField.OnValueChanged(System.EventArgs)" /> method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.</para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Raises the <see cref="E:System.Web.UI.WebControls.HiddenField.ValueChanged" /> event.</para>
</summary>
<param name="e">
<attribution license="cc4" from="Microsoft" modified="false" />An <see cref="T:System.EventArgs" /> object that contains the event data. </param>
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName="RaisePostDataChangedEvent">
<MemberSignature Language="C#" Value="protected virtual void RaisePostDataChangedEvent ();" />
<MemberType>Method</MemberType>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>The <see cref="M:System.Web.UI.WebControls.HiddenField.RaisePostDataChangedEvent" /> method is a helper method used by the <see cref="T:System.Web.UI.WebControls.HiddenField" /> class to notify the ASP.NET application that the state of the <see cref="T:System.Web.UI.WebControls.HiddenField" /> control has changed.</para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Notifies the ASP.NET application that the state of the <see cref="T:System.Web.UI.WebControls.HiddenField" /> control has changed.</para>
</summary>
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName="Render">
<MemberSignature Language="C#" Value="protected override void Render (System.Web.UI.HtmlTextWriter writer);" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="writer" Type="System.Web.UI.HtmlTextWriter" />
</Parameters>
<Docs>
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>The <see cref="M:System.Web.UI.WebControls.HiddenField.Render(System.Web.UI.HtmlTextWriter)" /> method is used to render the server control content to the client's browser using the specified <see cref="T:System.Web.UI.HtmlTextWriter" /> object.</para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Renders the Web server control content to the client's browser using the specified <see cref="T:System.Web.UI.HtmlTextWriter" /> object.</para>
</summary>
<param name="writer">
<attribution license="cc4" from="Microsoft" modified="false" />The <see cref="T:System.Web.UI.HtmlTextWriter" /> object used to render the server control content on the client's browser. </param>
</Docs>
</Member>
<Member MemberName="SkinID">
<MemberSignature Language="C#" Value="public override string SkinID { set; get; }" />
<MemberType>Property</MemberType>
<ReturnValue>
<ReturnType>System.String</ReturnType>
</ReturnValue>
<Docs>
<value>To be added.</value>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>The <see cref="T:System.Web.UI.WebControls.HiddenField" /> control does not support themes. This property has been overridden to always return an empty string. If you attempt to set this property, a <see cref="T:System.NotSupportedException" /> is thrown.</para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Gets or sets the skin to apply to the control.</para>
</summary>
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName="System.Web.UI.IPostBackDataHandler.LoadPostData">
<MemberSignature Language="C#" Value="bool IPostBackDataHandler.LoadPostData (string postDataKey, System.Collections.Specialized.NameValueCollection postCollection);" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Boolean</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="postDataKey" Type="System.String" />
<Parameter Name="postCollection" Type="System.Collections.Specialized.NameValueCollection" />
</Parameters>
<Docs>
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>This member is an explicit interface member implementation. It can be used only when the <see cref="T:System.Web.UI.WebControls.HiddenField" /> instance is cast to an <see cref="T:System.Web.UI.IPostBackDataHandler" /> interface.</para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>For a description of this member, see the <see cref="M:System.Web.UI.IPostBackDataHandler.LoadPostData(System.String,System.Collections.Specialized.NameValueCollection)" /> method.</para>
</summary>
<returns>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>true if the server control's state changes as a result of the postback; otherwise, false.</para>
</returns>
<param name="postDataKey">
<attribution license="cc4" from="Microsoft" modified="false" />The key identifier for the control.</param>
<param name="postCollection">
<attribution license="cc4" from="Microsoft" modified="false" />The collection of all incoming name values.</param>
</Docs>
</Member>
<Member MemberName="System.Web.UI.IPostBackDataHandler.RaisePostDataChangedEvent">
<MemberSignature Language="C#" Value="void IPostBackDataHandler.RaisePostDataChangedEvent ();" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>This member is an explicit interface member implementation. It can be used only when the <see cref="T:System.Web.UI.WebControls.HiddenField" /> instance is cast to an <see cref="T:System.Web.UI.IPostBackDataHandler" /> interface.</para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>For a description of this member, see the <see cref="M:System.Web.UI.IPostBackDataHandler.RaisePostDataChangedEvent" /> method.</para>
</summary>
</Docs>
</Member>
<Member MemberName="Value">
<MemberSignature Language="C#" Value="public virtual string Value { set; get; }" />
<MemberType>Property</MemberType>
<Attributes>
<Attribute>
<AttributeName>System.ComponentModel.Bindable(true)</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.String</ReturnType>
</ReturnValue>
<Docs>
<value>To be added.</value>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Use the <see cref="P:System.Web.UI.WebControls.HiddenField.Value" /> property to specify or determine the value of the <see cref="T:System.Web.UI.WebControls.HiddenField" /> control.</para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Gets or sets the value of the hidden field.</para>
</summary>
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName="ValueChanged">
<MemberSignature Language="C#" Value="public event EventHandler ValueChanged;" />
<MemberType>Event</MemberType>
<ReturnValue>
<ReturnType>System.EventHandler</ReturnType>
</ReturnValue>
<Docs>
<since version=".NET 2.0" />
<remarks>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>The <see cref="E:System.Web.UI.WebControls.HiddenField.ValueChanged" /> event is raised when the value of the <see cref="T:System.Web.UI.WebControls.HiddenField" /> control changes between posts to the server. This allows you to provide an event-handling method that performs a custom routine whenever this event occurs.</para>
<para>For more information about handling events, see <format type="text/html"><a href="01e4f1bc-e55e-413f-98c7-6588493e5f67">Consuming Events</a></format>.</para>
</remarks>
<summary>
<attribution license="cc4" from="Microsoft" modified="false" />
<para>Occurs when the value of the <see cref="T:System.Web.UI.WebControls.HiddenField" /> control changes between posts to the server.</para>
</summary>
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
</Members>
</Type>
|
