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textbox + lostfocus

photo
funa
12. 3. 2010 10:39:41
Body: 1575
Najaktívnejší č.: 18

textbox + lostfocus

Caute.
Viem nejak odchytit asp:Textbox ... LostFocus, a priradit mu nejaku metodu v kode?

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photo
T
12. 3. 2010 11:18:54
Body: 16750
Najaktívnejší č.: 2

RE: textbox + lostfocus

@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, MCPD

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photo
T
13. 3. 2010 21:39:06
Body: 16750
Najaktívnejší č.: 2

RE: textbox + lostfocus

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
          &amp;&amp; Page != null
          &amp;&amp; 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, MCPD

[Reakcia]
photo
funa
14. 3. 2010 13:36:47
Body: 1575
Najaktívnejší č.: 18

RE: textbox + lostfocus

ok super.


diky moc.............

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photo
T
14. 3. 2010 16:04:10
Body: 16750
Najaktívnejší č.: 2

RE: textbox + lostfocus

@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
&amp;&amp; Blur != null
&amp;&amp; page != null
&amp;&amp; page.Form != null //error is thrown anyway
&amp;&amp; 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, MCPD

[Reakcia]
photo
T
14. 3. 2010 16:07:09
Body: 16750
Najaktívnejší č.: 2

RE: textbox + lostfocus

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
&amp;&amp; Blur != null
&amp;&amp; page != null
&amp;&amp; page.Form != null //error is thrown anyway
&amp;&amp; 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, MCPD

[Reakcia]
photo
funa
15. 3. 2010 8:41:34
Body: 1575
Najaktívnejší č.: 18

RE: textbox + lostfocus

No fajn.
Diky moc.
A za sa vola textchanged skor mi nevadi :)

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