ASP.NET

Re: GridView....Index Out Of Range Exception....PLEASE HELP !

23-Jul-09 10:50

Hi Abhijit,

Thank you for your response. The value of [theRow] is whatever the value of the selected row is that triggered the event was. This works correctly, as checked in debug mode. I have now determined that the Rows value is returning "0" rows in the array as determined by GridView.Rows.Count. I do not know why...yet. Any ideas?

Abhijit Jana23-Jul-09 11:04

Re: GridView....Index Out Of Range Exception....PLEASE HELP !

23-Jul-09 11:04

In which event or method you have wrote this code ? Can you please provide some more code on Grid Selection Index changed event. Please post code with proper format.
Thanks.

cheers,
Abhijit
CodeProject MVP
Web Site:abhijitjana.net
When you ask a question, remember to click "Good Answer", If the Answer is helps you.

PDTUM23-Jul-09 11:12

Re: GridView....Index Out Of Range Exception....PLEASE HELP !

23-Jul-09 11:12

Abhijit,

Thank you. Please find the complete RowCommand event below. Failure occurs on the gvr Cast.

protected void GridViewResults_RowCommand(object sender, GridViewCommandEventArgs e)
{
GridViewResults.EnableViewState = true;

int count = GridViewResults.Rows.Count;

//Define the row and cell
int theRow = Convert.ToInt32(e.CommandArgument);
int theCell = 5;

//Get the Row information
GridViewRow gvr = (GridViewRow)GridViewResults.Rows[theRow]; ////FAILS...ROWS (Count) reports NULL! WHY?

//Get the information from the cell
string thePdf = gvr.Cells[theCell].Text;

//Pass the pdf information, start the users Pdf Reader
Process.Start(thePdf);

}
}

Abhijit Jana23-Jul-09 11:35

Re: GridView....Index Out Of Range Exception....PLEASE HELP !

23-Jul-09 11:35

PDTUM wrote:

//Define the row and cell
int theRow = Convert.ToInt32(e.CommandArgument);

Does the value of theRow Comming properly ? Where did you set value for CommandArgument ?

PDTUM wrote:
//Pass the pdf information, start the users Pdf Reader
Process.Start(thePdf);

What are you doing here? This will not start the pdf reader on client system. It will execute only on server. D'Oh! | :doh:

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
Don't forget to click "Good Answer" on the post(s) that helped you.

PDTUM23-Jul-09 11:46

Re: GridView....Index Out Of Range Exception....PLEASE HELP !

23-Jul-09 11:46

Hi Abhijit,

The e.CommandArguement value for the row is correctly reported, depending on the row that was selected. As for the Pdf, I appreciate your input. I have not gotten far enough yet to see this problem (I just jotted it down without testing it). Please correct as necessary... Smile | :)

...BUT first I need to be able to retrieve the text from the cell. I am sure the error is coming from the Rows value of this line:

GridViewRow gvr = (GridViewRow)GridViewResults.Rows[theRow];

NOT the value of [theRow]. Unfortunately, I am stuck at this point. Thanks again for your help. Any ideas?

Abhijit Jana23-Jul-09 12:03

Re: GridView....Index Out Of Range Exception....PLEASE HELP !

23-Jul-09 12:03

PDTUM wrote:
GridViewRow gvr = (GridViewRow)GridViewResults.Rows[theRow];

Simply use
GridViewRow gvr = GridViewResults.Rows[theRow];
Why you are using RowCommand event where as you are not using any Command Name? Why you are not using Selection index changed ?
Please go through the link

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
Don't forget to click "Good Answer" on the post(s) that helped you.

PDTUM23-Jul-09 12:26

Re: GridView....Index Out Of Range Exception....PLEASE HELP !

23-Jul-09 12:26

OK....it seems the gvr will work without the cast (I tried it)....BUT....I was using the RowCommand event to get the number of the selected row so I could pass it in. I suppose I could use both events and pass the row number to a class level variable, but why not do everything at the same time? Either way, the issue is not with the row number, but rather because the NUMBER OF ROWS being reported is NULL according to the GridViewResults.Rows.Count script. If I can determine why this is, I think the problem will be solved. Thanks for your help....I'm still working on it...keep in touch, Pat

PDTUM23-Jul-09 13:13

Re: GridView....Index Out Of Range Exception....PLEASE HELP !

23-Jul-09 13:13

OK Gentleman,

Thank you all. I have found that rows of the GridView were being nullified during postback by a method call on the Page_Load event. For those of you with a similar issue, the final working code regarding how to get row and cell data from a gridview in ASP.NET, here is a perfect and easy solution code using the RowCommand event:

protected void GridViewResults_RowCommand(object sender, GridViewCommandEventArgs e)
{
GridViewResults.EnableViewState = true;

int count = GridViewResults.Rows.Count; //Checks for a positive returned number of rows

//Define the row and cell
int theRow = Convert.ToInt32(e.CommandArgument); //Gets the Row Number
int theCell = 6; //Defines the Cell Row

//Get the Row information
GridViewRow gvr = GridViewResults.Rows[theRow]; //Creates a GridViewRow Object

//Get the information from the cell
string thePdf = gvr.Cells[theCell].Text; // Returns the data from the selected Cell

To all you guys out there....ENJOY.

Abhijit Jana23-Jul-09 19:47

Re: GridView....Index Out Of Range Exception....PLEASE HELP !

23-Jul-09 19:47

PDTUM wrote:
I have found that rows of the GridView were being nullified during postback by a method call on the Page_Load event.

This is one of the common mistake done in begining while binding any data with some control. You should take care about Page.IsPostback Property. Thumbs Up | :thumbsup:

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
Don't forget to click "Good Answer" on the post(s) that helped you.

Ravi Kakumani13-Aug-09 5:14

Ravi Kakumani

13-Aug-09 5:14

Gridview shouldn't bind in postback

so bing your datagrid as follows. This will fix ur problem..

if (!IsPostBack)
{ 
      //Gridview binding code comes here
      BindGridView();
}

-Ravi Kakumani

Re: GridView....Index Out Of Range Exception....PLEASE HELP !

PDTUM13-Aug-09 6:46

connect a ROW of database to MSCHART in asp.net

13-Aug-09 6:46

Ravi,

Thank you for your reply. The solution that I posted in an earlier message is working perfectly in all browsers. I appreciate your input and hope that you will be available to assist me on other issues as they arise.

Best Regards, Pat

solo_gaurav23-Jul-09 6:06

Re: connect a ROW of database to MSCHART in asp.net

23-Jul-09 6:06

hey im using mscharts im unable to show multiple columns value or the value of one row selected from database one either axis of web chart(either on X aixs or on y axis) .. plz help me buddies really needed urgently..
here is my row eg:

title|2006|2007|2008|2009|
bmat |1.70|8.69|4.67|23.8|

i have installed .net framework 3.5 sp1
and vs addons , mscharts...plz help buddies
any guidence will be appreciated

Abhijit Jana23-Jul-09 6:18

Re: connect a ROW of database to MSCHART in asp.net

23-Jul-09 6:18

Gaurav,
Did you download the samples from here
Samples Environment for Chart Controls

cheers,
Abhijit
CodeProject MVP
Web Site:abhijitjana.net
When you ask a question, remember to click "Good Answer", If the Answer is helps you.

solo_gaurav23-Jul-09 6:21

Re: connect a ROW of database to MSCHART in asp.net

23-Jul-09 6:21

let me check.. thanks Smile | :)

solo_gaurav23-Jul-09 6:41

Re: connect a ROW of database to MSCHART in asp.net

23-Jul-09 6:41

hey abhijit its showing some error...
can u guide me a bit more Smile | :)

thanks in advance

Abhijit Jana23-Jul-09 6:43

Re: connect a ROW of database to MSCHART in asp.net

23-Jul-09 6:43

What error it is show ? How you are trying to open the application?

cheers,
Abhijit
CodeProject MVP
Web Site:abhijitjana.net
When you ask a question, remember to click "Good Answer", If the Answer is helps you.

solo_gaurav23-Jul-09 6:59

Install a software without downloading and prompting

23-Jul-09 6:59

now i have done rectification working.... let me look for thing of my purpose... Smile | :)

Member 159723023-Jul-09 5:12

Member 1597230

23-Jul-09 5:12

Hi,

I am wanting to create an asp.net website, that will allow the user to download a software. So instead of downloading the software, I want if the user click on download button, the software gets started installation.

How this can be achievable?

Burhan-

Re: Install a software without downloading and prompting

Manas Bhardwaj23-Jul-09 5:37

Manas Bhardwaj

23-Jul-09 5:37

Member 1597230 wrote:
I want if the user click on download button, the software gets started installation

Would you mind to tell us why you want to do this?
This is ually done for installing malware. OMG | :OMG:

Manas Bhardwaj
Please remember to rate helpful or unhelpful answers, it lets us and people reading the forums know if our answers are any good.

Re: Install a software without downloading and prompting

Abhijit Jana23-Jul-09 5:51