ASP.NET

18-Sep-09 2:04

Hello all,

In my ASP.Net application, i am transferring GridView contents to a excel file. I am using following code:

string attachment = "attachment; filename=MakeList.xls";
            Response.ClearContent();
            Response.AddHeader("content-disposition", attachment);
            Response.ContentType = "application/ms-excel";
            StringWriter sw = new StringWriter();
            HtmlTextWriter htw = new HtmlTextWriter(sw);
            GridView1.RenderControl(htw);
            Response.Write(sw.ToString());
            Response.End();

It was working fine, but as soon as i put this code in try-catch block, i am getting this error:
"Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack."

If i remove try-catch block, it again works fine.

Can anyone tell me whats the problem? Am i miising something?

Thanks,
Nagendra.

Arun Jacob18-Sep-09 2:19

18-Sep-09 2:19

Check this threads,

http://social.msdn.microsoft.com/Forums/en-US/vsdebug/thread/817776da-13da-43f5-a189-1727ce4f3b6b[^]
http://support.microsoft.com/kb/312629/EN-US/[^]

nagendrathecoder18-Sep-09 2:31

18-Sep-09 2:31

I tried the solution. Now i am not getting any exception but now instead of GridView contents, the whole WebPage is copied in excel file. Confused | :confused:

I want only GridView contents in excel file.

Arun Jacob18-Sep-09 2:33

18-Sep-09 2:33

What you have done? Confused | :confused:

I think you removed Response.End(). Confused | :confused:

nagendrathecoder18-Sep-09 2:36

18-Sep-09 2:36

Yes, as mentioned in that post, i used "HttpContext.Current.ApplicationInstance.CompleteRequest()" in place of Response.End()

Problum In Javascript

Sachin Dubey18-Sep-09 1:50

18-Sep-09 1:50

Hi All My Friends,
I Have 2 problems in a javascript.

1: I am not getting the Item Count Of Dropdown List.
2: I am calling javascript on Button "OnClientClick" event,then also onclick event is fired even script returning false.

Hav a look on Script

function validate()
{

if (document.getElementById("<%=ddlCategories.ClientID%>").selectedIndex == 0) {
alert("Select a Category name !")
document.getElementById("<%=ddlCategories.ClientID%>").focus()
return false;
}
else if (document.getElementById("<%=txtText.ClientID%>").value == "") {
alert("Please fill the Message field !")
document.getElementById("<%=txtText.ClientID%>").focus()
return false;
}
else {
if (SubcategoryCount > 0) {

if (document.getElementById("<%=ddlCategories.ClientID%>").selectedIndex != 0 && document.getElementById("<%=ddlSubCategories.ClientID%>").selectedIndex == 0) {

alert("Select a Sub-Category name !")
return false;
}

}
}
}

Arun Jacob18-Sep-09 2:08

18-Sep-09 2:08

Sachin Dubey wrote:
if (SubcategoryCount > 0) {

Where you got this SubcategoryCount from? Confused | :confused:

Its good if you can make your code little bit readable to the forum readers. Smile | :)

Sachin Dubey18-Sep-09 2:10

18-Sep-09 2:10

That is only i asked in first question.. I Have ddlSubCategories in Page

Arun Jacob18-Sep-09 2:14

18-Sep-09 2:14

Sachin Dubey wrote:
That is only i asked in first question

that i know. Smile | :)

What i am asking is, in your code you have a line of code like,SubcategoryCount>0,
Whats SubcategoryCount?Is it a global variable?How you are assigning value for that?

Sachin Dubey18-Sep-09 2:19

18-Sep-09 2:19

That is not any Variable...That is just i written...

But I want to Use ddlSubcategories.Items.Count in place of SubCategoryCount..
But I Am not Getting the value...

Actually if user doesnt select category then Select Category alert will Prompt..If User Selected Category And There is no Subcategory of that then we allow him to proceed...But if that category has some Sub Categories then its must to Select SubCategory...

Thats what i Want in Else Condition u see...

Arun Jacob18-Sep-09 2:23

18-Sep-09 2:23

Sachin Dubey wrote:
That is not any Variable...That is just i written...

How we know its simply written. Smile | :)

Ok.Try ddlSubCategory.options.length

Sachin Dubey18-Sep-09 2:31

18-Sep-09 2:31

Thanks Arun I Got The count By :

if (document.getElementById("<%=ddlSubCategories.ClientID%>").options.length > 1)
Now its showing the message also...But Its Saving the record ...

My Code of Button is:

<asp:button id="btnSave" runat="server" text="Save" width="100px" onclientclick="javascript:validate();" onclick="btnSave_Click">

After reading that script it reading On_click event Code...

How to Tackele that..

Arun Jacob18-Sep-09 2:34

18-Sep-09 2:34

Sachin Dubey wrote:
OnClientClick="javascript:validate();"

Instead try this,

OnClientClick="return validate();"

Sachin Dubey18-Sep-09 2:36

18-Sep-09 2:36

Hey Arun... It Works...

Thanks A Lot.... Smile | :)

datatable

sekannak18-Sep-09 1:12

sekannak

18-Sep-09 1:12

Hi,

I am having datatable .. i want to add columns to that , i need to add same column once again ... is it possible ???
if it possible pls let me know the right path ...

for i=0 to 10
datatable.column.add("values to be added")
next

note: it throughs excepttion like , column already exist

thanks,
sekannak...

kannak

Re: datatable

Arun Jacob18-Sep-09 1:21

18-Sep-09 1:21

sekannak wrote:
. i want to add columns to that , i need to add same column once again

I don't think that your idea is good.If you are trying to add same column again you'll get that error.What you are trying to acheive by adding same column again?
Confused | :confused:

how to create frames in ASP.NET

Re: datatable

Not Active18-Sep-09 2:19

Not Active

18-Sep-09 2:19

As you have found, column names must be unique. The values you store in the column can be the same of course.

only two letters away from being an asset

QuickDeveloper17-Sep-09 22:53

QuickDeveloper

17-Sep-09 22:53

hi
i have created a ASP.NET web application.

I have 3 web forms (.aspx) pages in that.I have 2 hyperlinks in one page.when i click on that link,the repective page should load.I am able to display page from link(without frames),but link disappears(since it's another page).

So can anybody tell me how to create frames,so that page will be displayed in some area and hyperlink will be visible at top?

"Every morning I go through Forbes list of 40 richest people in the world. If my name is not in there, I go to work..!!!"

nagendrathecoder17-Sep-09 23:01

17-Sep-09 23:01

You can use Master & Content page for this functionality.
Keep hyperlinks in MasterPage and add other 2 pages as content page.

Christian Graus17-Sep-09 23:55

Christian Graus

17-Sep-09 23:55

You don't have to do anything special. Just create a page that contains frames, and put your page in one, and your static page in the other.

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

QuickDeveloper18-Sep-09 0:10

QuickDeveloper

18-Sep-09 0:10

thank you very much Christian...

could you give a sample link ....(you mean i need to create frames in html page and put target as .aspx page)??

"Every morning I go through Forbes list of 40 richest people in the world. If my name is not in there, I go to work..!!!"