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 AspNet.sk > F�rum > .NET > Web Forms (ASP.NET)
Diskusné fórum
funa
12. 3. 2010 10:39:41
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textbox + lostfocus
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Caute.
Viem nejak odchytit asp:Textbox ... LostFocus, a priradit mu nejaku metodu v kode?
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T
12. 3. 2010 11:18:54
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RE: textbox + lostfocus
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@funa: bolo by treba doimplementovat do textboxu, nie je to tazke....trik je pridat onblur atribut do neho volanie __dopostback s tagetom samym controlom a po postbacku firenut zodpovedajuci event...vecer Ti to urobim, ak budem mat cas
Tomáš Zeman, MCSD.NET
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T
13. 3. 2010 21:39:06
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RE: textbox + lostfocus
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Ahoj, neviem ci je to este aktualne...ale paci... public class TextBox
: System.Web.UI.WebControls.TextBox
,IPostBackEventHandler
  ...{
 public event EventHandler<EventArgs> Blur;
protected virtual void OnBlur(EventArgs args)
  ...{
if (Blur != null)
Blur(this, args);
 }
protected override void AddAttributesToRender(HtmlTextWriter writer)
...{
base.AddAttributesToRender(writer);
if (AutoPostBack
&& Page != null
&& Page.Request.Browser.EcmaScriptVersion.Major >= 1)
...{
PostBackOptions options =
new PostBackOptions(this, "blur");
options.AutoPostBack = Page.Form != null;
options.PerformValidation = true;
options.ValidationGroup = ValidationGroup;
writer.AddAttribute("onblur",
Page
.ClientScript
.GetPostBackEventReference(options, true));
}
}
public void RaisePostBackEvent(string eventArgument)
...{
if (eventArgument == "blur")
OnBlur(new EventArgs());
}
 }<my:TextBox runat="server" AutoPostBack="true" ID="MyTextBox" OnBlur="MyTextBox_Blur" />
Tomáš Zeman, MCSD.NET
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funa
14. 3. 2010 13:36:47
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RE: textbox + lostfocus
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ok super.
diky moc.............
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T
14. 3. 2010 16:04:10
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RE: textbox + lostfocus
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@funa:
tu je fix, stale je tam problem, ze sa server side firene textchanged pred blurom, viem patchnut aj to, ale nie je to moc pekne :-D
public class TextBox
: System.Web.UI.WebControls.TextBox
,IPostBackEventHandler
...{
private const string
BLUR_DHMTL_EVENT = "onblur",
BLUR_CHANGE_EVENT = "onchange",
BLUR_EVENT_ARGS = "blur";
public event EventHandler<EventArgs> Blur;
protected virtual void OnBlur(EventArgs args)
...{
if (Blur != null)
Blur(this, args);
}
protected override void AddAttributesToRender(HtmlTextWriter writer)
...{
Page page = Page;
bool applyBlurEvent=
AutoPostBack
&& Blur != null
&& page != null
&& page.Form != null //error is thrown anyway
&& page.Request.Browser.EcmaScriptVersion.Major >= 1;
string currentBlurJS = String.Empty;
if (applyBlurEvent)
...{
string currentChangeJS = String.Empty;
if (HasAttributes)
...{
currentBlurJS = Attributes[BLUR_DHMTL_EVENT];
if (!String.IsNullOrEmpty(currentBlurJS))
...{
if (!currentBlurJS.EndsWith(";"))
currentBlurJS += ";";
Attributes.Remove(BLUR_DHMTL_EVENT);
}
currentChangeJS = Attributes[BLUR_DHMTL_EVENT];
if (!String.IsNullOrEmpty(currentChangeJS))
...{
if (!currentChangeJS.EndsWith(";"))
currentChangeJS += ";";
}
}
//ensure onchange won't postback
Attributes["onchange"]=
currentChangeJS + "return false;";
}
base.AddAttributesToRender(writer);
if(applyBlurEvent)
...{
PostBackOptions options =
new PostBackOptions(this, BLUR_EVENT_ARGS);
options.AutoPostBack = true;
options.PerformValidation = true;
options.ValidationGroup = ValidationGroup;
string blurJS = currentBlurJS
+ page
.ClientScript
.GetPostBackEventReference(options, true);
writer.AddAttribute(BLUR_DHMTL_EVENT, blurJS);
}
}
public void RaisePostBackEvent(string eventArgument)
...{
if (eventArgument == BLUR_EVENT_ARGS)
OnBlur(new EventArgs());
}
} Inak ten bazovy AddAttributesToRender je dost zly napisany :-(
Tomáš Zeman, MCSD.NET
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[Reakcia]
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T
14. 3. 2010 16:07:09
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RE: textbox + lostfocus
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Mea culpa - mea maxima culpa :-))
public class TextBox
: System.Web.UI.WebControls.TextBox
,IPostBackEventHandler
...{
private const string
BLUR_DHMTL_EVENT = "onblur",
BLUR_CHANGE_EVENT = "onchange",
BLUR_EVENT_ARGS = "blur";
public event EventHandler<EventArgs> Blur;
protected virtual void OnBlur(EventArgs args)
...{
if (Blur != null)
Blur(this, args);
}
protected override void AddAttributesToRender(HtmlTextWriter writer)
...{
Page page = Page;
bool applyBlurEvent=
AutoPostBack
&& Blur != null
&& page != null
&& page.Form != null //error is thrown anyway
&& page.Request.Browser.EcmaScriptVersion.Major >= 1;
string currentBlurJS = String.Empty;
if (applyBlurEvent)
...{
string currentChangeJS = String.Empty;
if (HasAttributes)
...{
currentBlurJS = Attributes[BLUR_DHMTL_EVENT];
if (!String.IsNullOrEmpty(currentBlurJS))
...{
if (!currentBlurJS.EndsWith(";"))
currentBlurJS += ";";
Attributes.Remove(BLUR_DHMTL_EVENT);
}
currentChangeJS = Attributes[BLUR_CHANGE_EVENT];
if (!String.IsNullOrEmpty(currentChangeJS))
...{
if (!currentChangeJS.EndsWith(";"))
currentChangeJS += ";";
}
}
//ensure onchange won't postback
Attributes["onchange"]=
currentChangeJS + "return false;";
}
base.AddAttributesToRender(writer);
if(applyBlurEvent)
...{
PostBackOptions options =
new PostBackOptions(this, BLUR_EVENT_ARGS);
options.AutoPostBack = true;
options.PerformValidation = true;
options.ValidationGroup = ValidationGroup;
string blurJS = currentBlurJS
+ page
.ClientScript
.GetPostBackEventReference(options, true);
writer.AddAttribute(BLUR_DHMTL_EVENT, blurJS);
}
}
public void RaisePostBackEvent(string eventArgument)
...{
if (eventArgument == BLUR_EVENT_ARGS)
OnBlur(new EventArgs());
}
}
Tomáš Zeman, MCSD.NET
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[Reakcia]
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funa
15. 3. 2010 8:41:34
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RE: textbox + lostfocus
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No fajn.
Diky moc.
A za sa vola textchanged skor mi nevadi :)
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