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//------------------------------------------------------------------------------
// <copyright file="HtmlInputText.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
/*
* HtmlInputText.cs
*
* Copyright (c) 2000 Microsoft Corporation
*/
namespace System.Web.UI.HtmlControls {
using System.ComponentModel;
using System;
using System.Collections;
using System.Collections.Specialized;
using System.Globalization;
using System.Web;
using System.Web.UI;
using System.Security.Permissions;
/// <devdoc>
/// <para>
/// The <see langword='HtmlInputText'/>
/// class defines the methods, properties, and events for the HtmlInputText server
/// control. This class allows programmatic access to the HTML <input type=
/// text>
/// and <input type=
/// password> elements on the server.
/// </para>
/// </devdoc>
[
DefaultEvent("ServerChange"),
SupportsEventValidation,
ValidationProperty("Value"),
]
public class HtmlInputText : HtmlInputControl, IPostBackDataHandler {
private static readonly object EventServerChange = new object();
/*
* Creates an intrinsic Html INPUT type=text control.
*/
public HtmlInputText() : base("text") {
}
/*
* Creates an intrinsic Html INPUT type=text control.
*/
/// <devdoc>
/// </devdoc>
public HtmlInputText(string type) : base(type) {
}
/*
* The property for the maximum characters allowed.
*/
/// <devdoc>
/// <para>
/// Gets or sets the maximum number of characters that
/// can be typed into the text box.
/// </para>
/// </devdoc>
[
WebCategory("Behavior"),
DefaultValue(""),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
public int MaxLength {
get {
string s = (string)ViewState["maxlength"];
return((s != null) ? Int32.Parse(s, CultureInfo.InvariantCulture) : -1);
}
set {
Attributes["maxlength"] = MapIntegerAttributeToString(value);
}
}
//
/*
* The property for the width of the TextBox in characters.
*/
/// <devdoc>
/// <para>
/// Gets or sets the width of a text box, in characters.
/// </para>
/// </devdoc>
[
WebCategory("Appearance"),
DefaultValue(-1),
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
]
public int Size {
get {
string s = Attributes["size"];
return((s != null) ? Int32.Parse(s, CultureInfo.InvariantCulture) : -1);
}
set {
Attributes["size"] = MapIntegerAttributeToString(value);
}
}
/*
* Value property.
*/
/// <devdoc>
/// <para>
/// Gets or sets the
/// contents of a text box.
/// </para>
/// </devdoc>
public override string Value {
get {
string s = Attributes["value"];
return((s != null) ? s : String.Empty);
}
set {
Attributes["value"] = MapStringAttributeToString(value);
}
}
[
WebCategory("Action"),
WebSysDescription(SR.HtmlInputText_ServerChange)
]
public event EventHandler ServerChange {
add {
Events.AddHandler(EventServerChange, value);
}
remove {
Events.RemoveHandler(EventServerChange, value);
}
}
/*
* Method used to raise the OnServerChange event.
*/
/// <devdoc>
/// </devdoc>
protected virtual void OnServerChange(EventArgs e) {
EventHandler handler = (EventHandler)Events[EventServerChange];
if (handler != null) handler(this, e);
}
/*
*
*/
/// <internalonly/>
/// <devdoc>
/// </devdoc>
protected internal override void OnPreRender(EventArgs e) {
base.OnPreRender(e);
bool disabled = Disabled;
if (!disabled && Page != null) {
Page.RegisterEnabledControl(this);
}
// if no change handler, no need to save posted property unless we are disabled;
// VSWhidbey 419040: We should never save password value in ViewState
if ((!disabled && Events[EventServerChange] == null) ||
Type.Equals("password", StringComparison.OrdinalIgnoreCase)) {
ViewState.SetItemDirty("value", false);
}
}
protected override void RenderAttributes(HtmlTextWriter writer) {
base.RenderAttributes(writer);
if (Page != null) {
Page.ClientScript.RegisterForEventValidation(RenderedNameAttribute);
}
}
/*
* Method of IPostBackDataHandler interface to process posted data.
* InputText process a newly posted value.
*/
/// <internalonly/>
/// <devdoc>
/// </devdoc>
bool IPostBackDataHandler.LoadPostData(string postDataKey, NameValueCollection postCollection) {
return LoadPostData(postDataKey, postCollection);
}
/// <internalonly/>
/// <devdoc>
/// </devdoc>
protected virtual bool LoadPostData(string postDataKey, NameValueCollection postCollection) {
string current = Value;
string inputString = postCollection.GetValues(postDataKey)[0];
if (!current.Equals(inputString)) {
ValidateEvent(postDataKey);
Value = inputString;
return true;
}
return false;
}
/*
* Method of IPostBackDataHandler interface which is invoked whenever posted data
* for a control has changed. InputText fires an OnServerChange event.
*/
/// <internalonly/>
/// <devdoc>
/// </devdoc>
void IPostBackDataHandler.RaisePostDataChangedEvent() {
RaisePostDataChangedEvent();
}
/// <internalonly/>
/// <devdoc>
/// </devdoc>
protected virtual void RaisePostDataChangedEvent() {
OnServerChange(EventArgs.Empty);
}
}
}
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