Post Back Function Name and Dynamic Form ID

[Kevin Phifer]

Is it possible to change the function name of the Postback
jscript function for a asp.net form. I'm gathering
content from multiple sources and can't have 2
__doPostBack 's on the same page. Also would like to be
able to dynamically change the form id, but it won't seems
to let me do a id="Form1<%# whatever %>" type thing.

I'm beginning the to think that I will have to create my
own "Page" class, but I would like to avoid this if
possible. If not, are there any carticles out there that
might point me in the right direction. Thanx in
advance....

[Natty Gur]

Hi,

1) you can render any function as you want, as long as the function set
__Eventtarget, __Eventargument set to correct values and the form submit
the event will occurred in the server.

2) You mean to change the form ID : this.FindControl ("WebForm9").ID =
"NattyGur";. can you explain why ?

Natty Gur[MVP]
Phone Numbers:
Office: [phone]
Fax: [phone]
Mobile: [phone]
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[Kevin Phifer]

Part 2 worked great. But maybe i need to ask the first
question in a different way.....

I want to change the function name that asp.net uses to do
post backs ("__doPostBack") to something
like "__doBostBack1" or something like that. How do I go
about getting asp.net to use a different name for is JS
post back routine?

-----Original Message-----
Hi,

1) you can render any function as you want, as long as the function set__Eventtarget, __Eventargument set to correct values and the form submitthe event will occurred in the server.

2) You mean to change the form ID : this.FindControl ("WebForm9").ID ="NattyGur";. can you explain why ?

Natty Gur[MVP]
Phone Numbers:
Office: [phone]
Fax: [phone]
Mobile: [phone]
*** Sent via Developersdex http://www.developersdex.com ***Don't just participate in USENET...get rewarded for it!
.

[Natty Gur]

Hi,

As far as I know you can use the Render function to replace __Dopostback
with _MyOwnPostBack :

override protected void Render(HtmlTextWriter writer )
{
StringBuilder oStringBuilder = new StringBuilder();
StringWriter oStringWriter = new StringWriter(oStringBuilder);
HtmlTextWriter oHtmlWriter = new HtmlTextWriter(oStringWriter);
base.Render(oHtmlWriter);

oStringBuilder = oStringBuilder.Replace("__dopostback",
"__dopostback1");
writer.Write(oStringBuilder.ToString());
}
Alternatively,

You can use Page.RegisterClientScriptBlock to render your own postback
function.

Natty Gur[MVP]

blog : http://weblogs.asp.net/ngur
Mobile: [phone]
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[Jacob Yang [MSFT]]

Hi Kevin,

Based on my research and experience, the __doPostBack function was
generated by ASP.NET and we cannot rename it.

However, to my knowledge, we can implement your task by hooking the call to
this function. Please check out the following two articles for this idea.

HOW TO: Manually Post Back for Specific Events in an .aspx Page Using
Visual Basic .NET
http://support.microsoft.com/default...b;en-us;328923

How postback works in ASP.NET
http://www.xefteri.com/articles/dec102002/default.aspx

Does it answer your question? If I have misunderstood your concern, please
feel free to let me know.

Best regards,

Jacob Yang
Microsoft Online Partner Support
Get Secure! ¨C www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.

[Kevin Phifer]

Jacob,
What I'm trying to do is have the page rename the
__doPostBack Javascript function name. Currently I found
a way to do it by creating my own Inheriting from the Page
class and overriding the Rendering method. This, however,
seems to ineffectient, but may be the only way for me to
do it. The following is my inheritied class code:

public class NewPage : System.Web.UI.Page
{
public NewPage():base()
{
}

protected override void Render
(HtmlTextWriter writer)
{
StringBuilder sb = new
StringBuilder();
StringWriter sw = new StringWriter
(sb);
HtmlTextWriter htw = new
HtmlTextWriter(sw);
base.Render(htw);
string html = sb.ToString().Replace
("__doPostBack","__newDoPostBack");;

writer.Write (html);
}
}
This works with the following snippet of html:

function __newDoPostBack(eventTarget, eventArgument) {
var theform;
if (window.navigator.appName.toLowerCase
().indexOf("netscape") > -1) {
theform = document.forms
["sometingnew"];
}
else {
theform = document.sometingnew;
}
theform.__EVENTTARGET.value =
eventTarget.split("$").join(":");
theform.__EVENTARGUMENT.value =
eventArgument;
theform.submit();
}

.......{snip}....

<select name="DropDownList1" onchange="__newDoPostBack
('DropDownList1','')"

.......{snip}....
It does do what I want it to do, but I hate all the string
manipulation. What I was hoping for was a property or
method to set this value for the framework.

Is there another way to do this?

-----Original Message-----
Hi Kevin,

Based on my research and experience, the __doPostBack function was generated by ASP.NET and we cannot rename it.

However, to my knowledge, we can implement your task by hooking the call to this function. Please check out the following two articles for this idea.
HOW TO: Manually Post Back for Specific Events in an .aspx Page Using Visual Basic .NET
http://support.microsoft.com/default.aspx?scid=kb;en- us;328923
How postback works in ASP.NET
http://www.xefteri.com/articles/dec102002/default.aspx

Does it answer your question? If I have misunderstood your concern, please feel free to let me know.

Best regards,

Jacob Yang
Microsoft Online Partner Support
Get Secure! ¨C www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.
.

[kevin]

Repost (Forgot my nospam alias)
Jacob,
What I'm trying to do is have the page rename the
__doPostBack Javascript function name. Currently I found
a way to do it by creating my own Inheriting from the Page
class and overriding the Rendering method. This, however,
seems to ineffectient, but may be the only way for me to
do it. The following is my inheritied class code:

public class NewPage : System.Web.UI.Page
{
public NewPage():base()
{
}

protected override void Render
(HtmlTextWriter writer)
{
StringBuilder sb = new
StringBuilder();
StringWriter sw = new StringWriter
(sb);
HtmlTextWriter htw = new
HtmlTextWriter(sw);
base.Render(htw);
string html = sb.ToString().Replace
("__doPostBack","__newDoPostBack");;

writer.Write (html);
}
}
This works with the following snippet of html:

function __newDoPostBack(eventTarget, eventArgument) {
var theform;
if (window.navigator.appName.toLowerCase
().indexOf("netscape") > -1) {
theform = document.forms
["sometingnew"];
}
else {
theform = document.sometingnew;
}
theform.__EVENTTARGET.value =
eventTarget.split("$").join(":");
theform.__EVENTARGUMENT.value =
eventArgument;
theform.submit();
}

........{snip}....

<select name="DropDownList1" onchange="__newDoPostBack
('DropDownList1','')"

........{snip}....
It does do what I want it to do, but I hate all the string
manipulation. What I was hoping for was a property or
method to set this value for the framework.

Is there another way to do this?

-----Original Message-----
Hi Kevin,

Based on my research and experience, the __doPostBack function was generated by ASP.NET and we cannot rename it.

However, to my knowledge, we can implement your task by hooking the call to this function. Please check out the following two articles for this idea.
HOW TO: Manually Post Back for Specific Events in an .aspx Page Using Visual Basic .NET
http://support.microsoft.com/default.aspx?scid=kb;en- us;328923
How postback works in ASP.NET
http://www.xefteri.com/articles/dec102002/default.aspx

Does it answer your question? If I have misunderstood your concern, please feel free to let me know.

Best regards,

Jacob Yang
Microsoft Online Partner Support
Get Secure! ¨C www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.
.

[Kevin Phifer]

Repost (Forgot my nospam alias) one more time.....
Jacob,
What I'm trying to do is have the page rename the
__doPostBack Javascript function name. Currently I found
a way to do it by creating my own Inheriting from the Page
class and overriding the Rendering method. This, however,
seems to ineffectient, but may be the only way for me to
do it. The following is my inheritied class code:

public class NewPage : System.Web.UI.Page
{
public NewPage():base()
{
}

protected override void Render
(HtmlTextWriter writer)
{
StringBuilder sb = new
StringBuilder();
StringWriter sw = new StringWriter
(sb);
HtmlTextWriter htw = new
HtmlTextWriter(sw);
base.Render(htw);
string html = sb.ToString().Replace
("__doPostBack","__newDoPostBack");;

writer.Write (html);
}
}
This works with the following snippet of html:

function __newDoPostBack(eventTarget, eventArgument) {
var theform;
if (window.navigator.appName.toLowerCase
().indexOf("netscape") > -1) {
theform = document.forms
["sometingnew"];
}
else {
theform = document.sometingnew;
}
theform.__EVENTTARGET.value =
eventTarget.split("$").join(":");
theform.__EVENTARGUMENT.value =
eventArgument;
theform.submit();
}

.........{snip}....

<select name="DropDownList1" onchange="__newDoPostBack
('DropDownList1','')"

.........{snip}....
It does do what I want it to do, but I hate all the string
manipulation. What I was hoping for was a property or
method to set this value for the framework.

Is there another way to do this?

-----Original Message-----
Hi Kevin,

Based on my research and experience, the __doPostBack function was generated by ASP.NET and we cannot rename it.

However, to my knowledge, we can implement your task by hooking the call to this function. Please check out the following two articles for this idea.
HOW TO: Manually Post Back for Specific Events in an .aspx Page Using Visual Basic .NET
http://support.microsoft.com/default.aspx?scid=kb;en- us;328923
How postback works in ASP.NET
http://www.xefteri.com/articles/dec102002/default.aspx

Does it answer your question? If I have misunderstood your concern, please feel free to let me know.

Best regards,

Jacob Yang
Microsoft Online Partner Support
Get Secure! ¨C www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.
.

[Jacob Yang [MSFT]]

Hi Kevin,

Thank you for your update

After I posted my previous reply, I also tried the override of the Render
method. As you tried above, by overriding the Render method, we can
implement the task to change the __doPostBack function to any others.

Although this approach can be used to implement our task, it is not a usual
operation. That is why I didn't recommend you last time.

By discussing with some other experts in this field, it comes that there is
no direct method or property to change the name of this function.

Please let me know if it makes sense.

Best regards,

Jacob Yang
Microsoft Online Partner Support
Get Secure! ¨C www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.

[Kevin Phifer]

Thanx for your help. I thought this might be the case....

-----Original Message-----
Hi Kevin,

Thank you for your update

After I posted my previous reply, I also tried the override of the Render method. As you tried above, by overriding the Render method, we can implement the task to change the __doPostBack function to any others.
Although this approach can be used to implement our task, it is not a usual operation. That is why I didn't recommend you last time.

By discussing with some other experts in this field, it comes that there is no direct method or property to change the name of this function.
Please let me know if it makes sense.

Best regards,

Jacob Yang
Microsoft Online Partner Support
Get Secure! ¨C www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.
.