dataGridView problems - C# Discussion Boards

Re: Codeproject forum ... ?

13-Oct-09 5:53

Well... This is Gr8. I think you can write an article and post it at codeproject.com on what you did.. so we can also get some idea on it.. Thumbs Up | :thumbsup:

Thanks
Md. Marufuzzaman

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Kevin Marois13-Oct-09 6:42

Kevin Marois

13-Oct-09 6:42

Huh??

Everything makes sense in someone's mind

Re: Codeproject forum ... ?

Abhijit Jana13-Oct-09 7:18

Abhijit Jana

13-Oct-09 7:18

Just have a look into it Smile | :)

JumpyForum: Inspired by Code Project Forum / Discussion / Message board[^]

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
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genrate data is not display in report viewer

vivek_s_IT13-Oct-09 2:41

vivek_s_IT

13-Oct-09 2:41

I m using crystal report with data base mysql.
i m genrating report dynamic.
as we select column from check box report will be genrate.
all thing is done well but genrated data is not display in report.
my problem is i result is not display in report.

Re: genrate data is not display in report viewer

Searril13-Oct-09 3:20

Searril

13-Oct-09 3:20

Why do people make posts like this with no code attached? Does Miss Cleo now frequent the CodeProject message boards?

Re: genrate data is not display in report viewer

Md. Marufuzzaman13-Oct-09 4:44

13-Oct-09 4:44

I think you should post in detail.. your code snippets.. error you are facing ..etc so that everyone can get the actual scenario.

Thanks
Md. Marufuzzaman

dataGridView problems

Steve5177113-Oct-09 2:30

13-Oct-09 2:30

Hello, I am having a small problem here and just cant figure it out.. I have an unbound datagridview object with 3 columns and am trying to simply pass the values added in the datagrid rows to a variable, messagebox, anything. The first two columns of the new row pass fine. But the last throws a NullReferenceException. (there is data typed in the cell). All cell background colors change BUT when I try to get the data entered in the cells, the last column throws the exception. Thank you!!!!

private void dataGridView1_RowLeave(object sender, DataGridViewCellEventArgs e)
{
DataClasses1DataContext dc = new DataClasses1DataContext();
Medication newMeds = new Medication();

for (int i = 0; i < dataGridView1.Rows[e.RowIndex].Cells.Count; i++)
{
dataGridView1[i, e.RowIndex].Style.BackColor = Color.Green; // works for all 3 rows
MessageBox.Show(dataGridView1[i, e.RowIndex].Value.ToString()); // Throws exception on 3rd row
}
}

Manas Bhardwaj13-Oct-09 2:40

Manas Bhardwaj

13-Oct-09 2:40

This shows that it has the null value in it...

try with this code, this will tell you whenever you have the null value. Smile | :)

for (int i = 0; i < dataGridView1.Rows[e.RowIndex].Cells.Count; i++)
{
dataGridView1[i, e.RowIndex].Style.BackColor = Color.Green; // works for all 3 rows

if(dataGridView1[i, e.RowIndex] == null)
	MessageBox.Show("Somehow, I have the null value here...");
else
	MessageBox.Show(dataGridView1[i, e.RowIndex].Value.ToString());
}

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.

Steve5177113-Oct-09 3:22

13-Oct-09 3:22

I have already figured it is NULL by debugging and stepping through the code... For some reason, the last cell reports NULL and there is data enteted in the cell.

Manas Bhardwaj wrote:
This shows that it has the null value in it...

try with this code, this will tell you whenever you have the null value.

for (int i = 0; i < dataGridView1.Rows[e.RowIndex].Cells.Count; i++){dataGridView1[i, e.RowIndex].Style.BackColor = Color.Green; // works for all 3 rowsif(dataGridView1[i, e.RowIndex] == null) MessageBox.Show("Somehow, I have the null value here...");else MessageBox.Show(dataGridView1[i, e.RowIndex].Value.ToString());}

Steve5177113-Oct-09 4:01

13-Oct-09 4:01

After a bit more hair pulling, I decided it has to be something in the event type.. So, I changed it to the event type : RowLeave...

Now it works... Same code, different event...

Luc Pattyn13-Oct-09 4:21

Luc Pattyn

13-Oct-09 4:21

IMO the probable cause is the data gets committed to the cell when you leave the cell, by moving focus to another cell or another Control.

Smile | :)

Luc Pattyn

I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages

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Jacobb Michael13-Oct-09 5:49

Jacobb Michael

13-Oct-09 5:49

Hi dont know How it is possible to get that error,

The same code you have given works fine ,

just i tried as bellow

DataTable dt = new DataTable();
            dt.Columns.Add("1");
            dt.Columns.Add("2");
            dt.Rows.Add("100", "101");
            dt.Rows.Add("102", "103");
            dt.Rows.Add("103", "104");
            dataGridView1.DataSource = dt;

private void dataGridView1_RowLeave(object sender, DataGridViewCellEventArgs e)
        {
            for (int i = 0; i < dataGridView1.Rows[e.RowIndex].Cells.Count; i++)
            {
                dataGridView1[i, e.RowIndex].Style.BackColor = Color.Green; // works for all 3 rows
                MessageBox.Show(dataGridView1[i, e.RowIndex].Value.ToString()); // Throws exception on 3rd row
            }
        }

Steve5177113-Oct-09 6:33

Open a POPUP consisting of Two Radio Buttons in Windows Applications

13-Oct-09 6:33

Not really sure either.. Only difference here is that I used VS2008 to configure the datagridview (columns, etc.)

Murthuja13-Oct-09 2:06

Murthuja

13-Oct-09 2:06

Hi All,

How to open a popup in Windows Applications and Please help me How i can pass the values from popup to the Parent Window.

I am Having a list of Archives to Play. once i select any of the archive , it should open a popup asking that in Which Screen it is to be played either in single screen or Multi Screen.

once i select either single or multi screen then the popup should be closed and as per the selection single or multi screen in parent form will be displayed.
this is an windows application.

Please help me to do this ..

Re: Open a POPUP consisting of Two Radio Buttons in Windows Applications

benjymous13-Oct-09 2:12

benjymous

13-Oct-09 2:12

Use a modal dialog, and have a property available on your child form class that exposes which option the user selected.

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Buzzwords!

Re: Open a POPUP consisting of Two Radio Buttons in Windows Applications

Jacobb Michael13-Oct-09 5:55

Jacobb Michael

13-Oct-09 5:55

Hi,

if you are using a form for pop up then it is very simple,

just pass the value from the parent form

frmChild child = new frmChild();
child.showdialogue(this)

You can read this value form in your child form form the constructor like

frmchild(frmParent parent)
{
//this parent can carry all the values of the parent form.
}

even you can just send some values as a arguments and access it

Get string name from listview selected item

Aljaz11113-Oct-09 1:44

Aljaz111

13-Oct-09 1:44

How to get string name of selected item in listview? I did it like this:

if(listView1.SelectedItems.Count!=0) string datoteka=listView1.SelectedItems[0].ToString;

And it gives me error. What am I doing wrong?

Manas Bhardwaj13-Oct-09 1:47

Manas Bhardwaj

13-Oct-09 1:47

Aljaz111 wrote:
if(listView1.SelectedItems.Count!=0) string datoteka=listView1.SelectedItems[0].~~ToString;~~

ToString() is a method and not a property.

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: Get string name from listview selected item [modified]

stancrm13-Oct-09 1:48

stancrm

13-Oct-09 1:48

string datoteka = listView1.SelectedItems[0].Text;

Md. Marufuzzaman13-Oct-09 4:12

13-Oct-09 4:12

You can also try the following.. Here you will get an advantage that is you dont need to pass the index..

this.listView1.FocusedItem.Text.ToString();)

Thanks
Md. Marufuzzaman

modified on Tuesday, October 13, 2009 10:46 AM

Luc Pattyn13-Oct-09 4:23

Luc Pattyn

13-Oct-09 4:23

Md. Marufuzzaman wrote:
this.listView1.FocusedItem.Text.ToString()

yep.
However, FocusedItem.Text is a text, hence a string already; no need to call ToString() on it.

Smile | :)

Luc Pattyn

I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages

Local announcement (Antwerp region): Lange Wapper? Neen!

Md. Marufuzzaman13-Oct-09 4:50

13-Oct-09 4:50

It’s a mistake… Thanks Smile | :)

Thanks
Md. Marufuzzaman