Establishing current row in DataGrid / DataTable

[StevenK]

How do I determine the current row that I am focused on in a DataGrid component (and hence the contents of that row) ?

We've made use of the HitTest but this only seems to be effective when we select the row through means of a MouseClick. We need to allow for the fact that the user may have clicked on it, cursor'ed up/down/left/right, Page Up/Down, Ctrl+Home/Ctrl+End, etc.

Ideally I want to have a button that I click and it reads back to me the contents of the current row.

I'm guessing this is easily done but I can't see it for looking.

Any help would be appreciated.
Thanks in advance

Steve

 

[StevenK]

I've now solved this issue making use of the syntax :

int currRow = dataGrid1.CurrentCell.RowNumber;
MessageBox.Show(currRow.ToString());

The issue I now have is that I get a reply of 0 if I am either on the first row in the grid (index starts at 0) or if I have an empty grid.

How can I determine whether or not the grid has any entries on display ?

Thanks again.
Steve

 

[Craig0201]

datagrid1.rows.count?

Craig

 

[StevenK]

I've tried ideas along that line but there is no dataGrid1.Rows.Count

I'm looking at using something like :

DataTable dt = (DataTable)dataGrid1.DataSource;
if (dt.Rows.Count == 0)
{
// Do something
}
else
{
// Cannot do something
}

The problem with this is that sometimes the conversion to a DataTable does not work as I am sometimes using DataSets and DataRelations through something like :
dataGrid2.SetDataBinding(dataSet1, "Table1"

Is there a more generic conversion I might look at making use of ?
Or should I put try ... catch's around code blocks for various 'DataSource's that sit behind the DataGrids ?

Any further thoughts ?

Thanks again.
Steve

 

[RiverGuy]

How about this to see if there is at least 1 row:

MessageBox.Show(dataGrid1.VisibleRowCount.ToString());

 

[StevenK]

This is something I considered but (playing devil's advocate) I'm also allowing the components to be resized (when the form is resized) so may well run the risk of having 0 visible rows, albeit that the user has selected a grid entry and then squashed up the grid.

Is there an alternative way that can be suggested ?

Steve

(Maybe I'm just being awkward now ...)

 

[RiverGuy]

Yeah, I assume you have a method that the form load calls to rezie and hide columns. Before you want to check for visible rows, call a method which does the oppisite--unhides everything. Then immediately after you get the count, call the hide method again. It would probably be virtually unnoticeable to the user.

 

[gailshusband]

does this work


int iRow;
iRow = dataGrid1.CurrentRowIndex;