[ControlBuilder(typeof(TextBoxControlBuilder)), DefaultProperty("Text"), ParseChildren(false), DataBindingHandler("System.Web.UI.Design.TextDataBindingHandler, System.Design, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"), ValidationProperty("Text"), DefaultEvent("TextChanged"), PermissionSet(SecurityAction.LinkDemand, XML="<PermissionSet class=\"System.Security.PermissionSet\"\r\n version=\"1\">\r\n <IPermission class=\"System.Web.AspNetHostingPermission, System, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089\"\r\n version=\"1\"\r\n Level=\"Minimal\"/>\r\n</PermissionSet>\r\n"), PermissionSet(SecurityAction.InheritanceDemand, XML="<PermissionSet class=\"System.Security.PermissionSet\"\r\n version=\"1\">\r\n <IPermission class=\"System.Web.AspNetHostingPermission, System, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089\"\r\n version=\"1\"\r\n Level=\"Minimal\"/>\r\n</PermissionSet>\r\n")]public class TextBox : WebControl, IPostBackDataHandler
{
// Fields
private static readonly object EventTextChanged;
// Events
[WebCategory("Action"), WebSysDescription("TextBox_OnTextChanged")]
public event EventHandler TextChanged;
// Methods
static TextBox();
public TextBox();
protected override void AddAttributesToRender(HtmlTextWriter writer);
protected override void AddParsedSubObject(object obj);
protected override void OnPreRender(EventArgs e);
protected virtual void OnTextChanged(EventArgs e);
protected override void Render(HtmlTextWriter writer);
bool IPostBackDataHandler.LoadPostData(string postDataKey, NameValueCollection postCollection);
void IPostBackDataHandler.RaisePostDataChangedEvent();
// Properties
[WebCategory("Behavior"), WebSysDescription("TextBox_AutoPostBack"), DefaultValue(false)]
public virtual bool AutoPostBack { get; set; }
[DefaultValue(0), WebSysDescription("TextBox_Columns"), Bindable(true), WebCategory("Appearance")]
public virtual int Columns { get; set; }
[Bindable(true), WebCategory("Behavior"), DefaultValue(0), WebSysDescription("TextBox_MaxLength")]
public virtual int MaxLength { get; set; }
[WebCategory("Behavior"), Bindable(true), DefaultValue(false), WebSysDescription("TextBox_ReadOnly")]
public virtual bool ReadOnly { get; set; }
[Bindable(true), WebCategory("Behavior"), DefaultValue(0), WebSysDescription("TextBox_Rows")]
public virtual int Rows { get; set; }
private bool SaveTextViewState { get; }
protected override HtmlTextWriterTag TagKey { get; }
[Bindable(true), WebCategory("Appearance"), DefaultValue(""), WebSysDescription("TextBox_Text"), PersistenceMode(PersistenceMode.EncodedInnerDefaultProperty)]
public virtual string Text { get; set; }
[DefaultValue(0), WebSysDescription("TextBox_TextMode"), WebCategory("Behavior")]
public virtual TextBoxMode TextMode { get; set; }
[WebCategory("Layout"), DefaultValue(true), WebSysDescription("TextBox_Wrap")]
public virtual bool Wrap { get; set; }
}
[ControlBuilder(typeof(TextBoxControlBuilder)), DefaultProperty("Text"), ParseChildren(false), DataBindingHandler("System.Web.UI.Design.TextDataBindingHandler, System.Design, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"), ValidationProperty("Text"), DefaultEvent("TextChanged"), PermissionSet(SecurityAction.LinkDemand, XML="<PermissionSet class=\"System.Security.PermissionSet\"\r\n version=\"1\">\r\n <IPermission class=\"System.Web.AspNetHostingPermission, System, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089\"\r\n version=\"1\"\r\n Level=\"Minimal\"/>\r\n</PermissionSet>\r\n"), PermissionSet(SecurityAction.InheritanceDemand, XML="<PermissionSet class=\"System.Security.PermissionSet\"\r\n version=\"1\">\r\n <IPermission class=\"System.Web.AspNetHostingPermission, System, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089\"\r\n version=\"1\"\r\n Level=\"Minimal\"/>\r\n</PermissionSet>\r\n")]
public class TextBox : WebControl, IPostBackDataHandler
{
// Fields
private static readonly object EventTextChanged = new object();
// Events
[WebCategory("Action"), WebSysDescription("TextBox_OnTextChanged")]
public event EventHandler TextChanged
{
add
{
base.Events.AddHandler(EventTextChanged, value);
}
remove
{
base.Events.RemoveHandler(EventTextChanged, value);
}
}
// Methods
public TextBox() : base(HtmlTextWriterTag.Input)
{
}
protected override void AddAttributesToRender(HtmlTextWriter writer)
{
int maxLength;
if (this.Page != null)
{
this.Page.VerifyRenderingInServerForm(this);
}
writer.AddAttribute(HtmlTextWriterAttribute.Name, this.UniqueID);
switch (this.TextMode)
{
case TextBoxMode.SingleLine:
{
writer.AddAttribute(HtmlTextWriterAttribute.Type, "text");
string text = this.Text;
if (text.Length > 0)
{
writer.AddAttribute(HtmlTextWriterAttribute.Value, text);
}
break;
}
case TextBoxMode.Password:
writer.AddAttribute(HtmlTextWriterAttribute.Type, "password");
break;
case TextBoxMode.MultiLine:
maxLength = this.Rows;
if (maxLength > 0)
{
writer.AddAttribute(HtmlTextWriterAttribute.Rows, maxLength.ToString(NumberFormatInfo.InvariantInfo));
}
maxLength = this.Columns;
if (maxLength > 0)
{
writer.AddAttribute(HtmlTextWriterAttribute.Cols, maxLength.ToString(NumberFormatInfo.InvariantInfo));
}
if (!this.Wrap)
{
writer.AddAttribute(HtmlTextWriterAttribute.Wrap, "off");
}
goto Label_00FF;
}
maxLength = this.MaxLength;
if (maxLength > 0)
{
writer.AddAttribute(HtmlTextWriterAttribute.Maxlength, maxLength.ToString(NumberFormatInfo.InvariantInfo));
}
maxLength = this.Columns;
if (maxLength > 0)
{
writer.AddAttribute(HtmlTextWriterAttribute.Size, maxLength.ToString(NumberFormatInfo.InvariantInfo));
}
Label_00FF:
if (this.ReadOnly)
{
writer.AddAttribute(HtmlTextWriterAttribute.ReadOnly, "readonly");
}
if (this.AutoPostBack && (this.Page != null))
{
string postBackClientEvent = this.Page.GetPostBackClientEvent(this, "");
if (base.HasAttributes)
{
string str3 = base.Attributes["onchange"];
if (str3 != null)
{
postBackClientEvent = str3 + postBackClientEvent;
base.Attributes.Remove("onchange");
}
}
writer.AddAttribute(HtmlTextWriterAttribute.Onchange, postBackClientEvent);
writer.AddAttribute("language", "javascript");
}
base.AddAttributesToRender(writer);
}
protected override void AddParsedSubObject(object obj)
{
if (!(obj is LiteralControl))
{
throw new HttpException(HttpRuntime.FormatResourceString("Cannot_Have_Children_Of_Type", "TextBox", obj.GetType().Name.ToString()));
}
this.Text = ((LiteralControl) obj).Text;
}
protected override void OnPreRender(EventArgs e)
{
base.OnPreRender(e);
if (!this.SaveTextViewState)
{
this.ViewState.SetItemDirty("Text", false);
}
if (((this.Page != null) && this.AutoPostBack) && this.Enabled)
{
this.Page.RegisterPostBackScript();
}
}
protected virtual void OnTextChanged(EventArgs e)
{
EventHandler handler = (EventHandler) base.Events[EventTextChanged];
if (handler != null)
{
handler(this, e);
}
}
protected override void Render(HtmlTextWriter writer)
{
this.RenderBeginTag(writer);
if (this.TextMode == TextBoxMode.MultiLine)
{
HttpUtility.HtmlEncode(this.Text, writer);
}
this.RenderEndTag(writer);
}
bool IPostBackDataHandler.LoadPostData(string postDataKey, NameValueCollection postCollection)
{
string text = this.Text;
string str2 = postCollection[postDataKey];
if (!text.Equals(str2))
{
this.Text = str2;
return true;
}
return false;
}
void IPostBackDataHandler.RaisePostDataChangedEvent()
{
this.OnTextChanged(EventArgs.Empty);
}
// Properties
[WebCategory("Behavior"), WebSysDescription("TextBox_AutoPostBack"), DefaultValue(false)]
public virtual bool AutoPostBack
{
get
{
object obj2 = this.ViewState["AutoPostBack"];
return ((obj2 != null) && ((bool) obj2));
}
set
{
this.ViewState["AutoPostBack"] = value;
}
}
[DefaultValue(0), WebSysDescription("TextBox_Columns"), Bindable(true), WebCategory("Appearance")]
public virtual int Columns
{
get
{
object obj2 = this.ViewState["Columns"];
if (obj2 != null)
{
return (int) obj2;
}
return 0;
}
set
{
if (value < 0)
{
throw new ArgumentOutOfRangeException("value");
}
this.ViewState["Columns"] = value;
}
}
[Bindable(true), WebCategory("Behavior"), DefaultValue(0), WebSysDescription("TextBox_MaxLength")]
public virtual int MaxLength
{
get
{
object obj2 = this.ViewState["MaxLength"];
if (obj2 != null)
{
return (int) obj2;
}
return 0;
}
set
{
if (value < 0)
{
throw new ArgumentOutOfRangeException("value");
}
this.ViewState["MaxLength"] = value;
}
}
[WebCategory("Behavior"), Bindable(true), DefaultValue(false), WebSysDescription("TextBox_ReadOnly")]
public virtual bool ReadOnly
{
get
{
object obj2 = this.ViewState["ReadOnly"];
return ((obj2 != null) && ((bool) obj2));
}
set
{
this.ViewState["ReadOnly"] = value;
}
}
[Bindable(true), WebCategory("Behavior"), DefaultValue(0), WebSysDescription("TextBox_Rows")]
public virtual int Rows
{
get
{
object obj2 = this.ViewState["Rows"];
if (obj2 != null)
{
return (int) obj2;
}
return 0;
}
set
{
if (value < 0)
{
throw new ArgumentOutOfRangeException("value");
}
this.ViewState["Rows"] = value;
}
}
private bool SaveTextViewState
{
get
{
if (this.TextMode == TextBoxMode.Password)
{
return false;
}
if (((base.Events[EventTextChanged] == null) && this.Enabled) && (this.Visible && (base.GetType() == typeof(TextBox))))
{
return false;
}
return true;
}
}
protected override HtmlTextWriterTag TagKey
{
get
{
if (this.TextMode == TextBoxMode.MultiLine)
{
return HtmlTextWriterTag.Textarea;
}
return HtmlTextWriterTag.Input;
}
}
[Bindable(true), WebCategory("Appearance"), DefaultValue(""), WebSysDescription("TextBox_Text"), PersistenceMode(PersistenceMode.EncodedInnerDefaultProperty)]
public virtual string Text
{
get
{
string str = (string) this.ViewState["Text"];
if (str != null)
{
return str;
}
return string.Empty;
}
set
{
this.ViewState["Text"] = value;
}
}
[DefaultValue(0), WebSysDescription("TextBox_TextMode"), WebCategory("Behavior")]
public virtual TextBoxMode TextMode
{
get
{
object obj2 = this.ViewState["Mode"];
if (obj2 != null)
{
return (TextBoxMode) obj2;
}
return TextBoxMode.SingleLine;
}
set
{
if ((value < TextBoxMode.SingleLine) || (value > TextBoxMode.Password))
{
throw new ArgumentOutOfRangeException("value");
}
this.ViewState["Mode"] = value;
}
}
[WebCategory("Layout"), DefaultValue(true), WebSysDescription("TextBox_Wrap")]
public virtual bool Wrap
{
get
{
object obj2 = this.ViewState["Wrap"];
if (obj2 != null)
{
return (bool) obj2;
}
return true;
}
set
{
this.ViewState["Wrap"] = value;
}
}
}
转载于:https://www.cnblogs.com/bestsaler/archive/2009/02/27/1835781.html
![七牛云-C#SDK-上传-前期准备[图]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)