Develop Reference

How to get current row of datagridview values when clicking on button?

I have a View Model in which my data is stored to be used on the presenter and window. However, I now need to get (when pressing a button) the current row's results on the grid into my view model. I first used the mouse double click event, but the requirements changed from that to a button on the form:
private void dgvResults_CellMouseDoubleClick(object sender, DataGridViewCellMouseEventArgs e)
{
if (this.colOrderNo.Index != e.ColumnIndex || e.RowIndex < 0) return;
var auditOrder = (PurchaseOrdersTrackingViewModel) this.dgvResults.Rows[e.RowIndex].DataBoundItem;
this.AuditOrderKey = $"{auditOrder.OrderNo}|{auditOrder.ItemNo}|{auditOrder.WarehouseId}|{auditOrder.ItemSequence}";
}
That's my old code. Now I need that here:
private void btnAuditLog_Click(object sender, EventArgs e)
Not sure how to refer to the RowIndex without the DataGridViewCellMouseEventArges event. I tried the CurrentRow property, but it doesn't do the job.
Just another question on the fly, if someone could assist with that as well, how do I get a value from one form to another, spesifically a properties value. It's not on the grid, in a control. It's basically just public string order that's all. I set the value on one form, then need it for query filtering on another. Let me know if you need anything else.

You want to use the SelectedRows property of the DataGridView. It tells which row is selected. In this case, you seem to want the first selected row (since you have a single property called this.AuditOrderKey).
The column order no to longer matters in this context.
if (dgvResults.SelectedRows.Count == 0) return;
var auditOrder = (PurchaseOrdersTrackingViewModel) dgvResults.SelectedRows[0].DataBoundItem;
this.AuditOrderKey = $"{auditOrder.OrderNo}|{auditOrder.ItemNo}|{auditOrder.WarehouseId}|{auditOrder.ItemSequence}";
If you don't have selected rows, CurrentRow is an option:
if (dgvResults.CurrentRow == null) return;
var auditOrder = (PurchaseOrdersTrackingViewModel) dgvResults.CurrentRow.DataBoundItem;
this.AuditOrderKey = $"{auditOrder.OrderNo}|{auditOrder.ItemNo}|{auditOrder.WarehouseId}|{auditOrder.ItemSequence}";

Use the SelectedRows property of the DataGridView. Assuming that you set your DataGridView as MultiSelect = false; and SelectionMode = FullRowSelect;
if (dgvResults.SelectedRows.Count > 0)
{
dgvResults.SelectedRows[0].Cells["yourColumnName"].Value.ToString();
}
In your button click event, it will look like this. (Assuming that your button name is btnEdit)
private void btnEdit_Click(object sender, EventArgs e)
{
if (dgvResults.SelectedRows.Count > 0)
{
string selectedValue = dgvResults.SelectedRows[0].Cells["yourColumnName"].Value.ToString();
}
}

Retrieve values from System.Data.Common.DataRecordInternal

I am looking to retrieve the values of a datagrid which is bound to a sqlexecute query.
defects.DefectsDataGrid.DataContext = searchQuery.ExecuteReader();
Then, I am using SelectedCellsChanged event to do something with the DataGridRow selected.
When I put a breakpoint in, I can see the values beneath System.Data.Common.DataRecordInternal > Non-public Members > _Values. But I am not sure how to reference the _Values.
Thanks for your help as always.
Code
private void DefectsDataGrid_SelectedCellsChanged(object sender, SelectedCellsChangedEventArgs e)
{
//Retrieve selected row
var rows = DefectsDataGrid.SelectedItems;
//This tells me I have one row, which is of type System.Data.Common.DataRecordInternal
//How do I retrieve the values from this type?
}

Looks like you need to use a DataReader to cast your records to IDataRecord.
See this answer : https://stackoverflow.com/a/6034408/414314

defects.DefectsDataGrid.DataContext = searchQuery.ExecuteReader();
I changed the above to the following, which gave me a data type of DataRowView instead of DataRecordInternal
defects.DefectsDataGrid.ItemsSource = DataTable.DefaultView;
This allowed me to easily reference the row in the event.
private void DefectsDataGrid_SelectedCellsChanged(object sender, SelectedCellsChangedEventArgs e)
{
//Retrieve selected value from the row selected
DataRowView dataRow = (DataRowView)DefectsDataGrid.SelectedItem;
string phrase = dataRow[2];
}

Add hyperlink like functionality in win forms

My motive is to display some information as link and on click of that, I should be able to get id of clicked item and open new window with detailed information of item. As i am new in win forms but i did some research, Possible option for this might be DataGridViewLinkColumn but i am not able to link id with column data and click event on which open new window.
Or there any other better approach possible.?

When you have a datagridview you can get the values of a cell as follows:
Firstly, create a cellclick event
datagridview1.CellClick+= CellClickEvent;
DataGridViewCellEventArgs holds some properties, these would be rowindex (row you clicked) and columnindex (column you clicked) and some other...
make a datagrid with 2 columns, column 0 holds the Id of the row, column 1 holds the link
void CellClickEvent(object sender, DataGridViewCellEventArgs e)
{
if(e.ColumnIndex == 1) // i'll take column 1 as a link
{
var link = datagridview1[e.columnindex, e.rowindex].Value;
var id = datagridview1[0, e.rowindex].Value;
DoSomeThingWithLink(link, id);
}
}
void DoSomeThingWithLink(string link, int id)
{
var myDialog = new Dialog(link,id);
myDialog.ShowDialog();
myDialog.Dispose(); //Dispose object after you have used it
}

I'm assuming you're using a DataGridView element.
What you could do is use the CellClick event of the object. It will have a DataGridViewCellEventArgs object passed on, on which there's a ColumnIndex property and a RowIndex property. This way you could figure out where in the the datagrid the user clicked.
And, for example, you could use that information to look up the id or other info since you now know the row & the cell the user clicked on.
arbitrary e.g.:
// wire up the event handler, this could be anywhere in your code
dataGridView.CellClick += dataGridView_CellClick; // when the event fires, the method dataGridView_CellClick (as shown below) will be executed
private void dataGridView_CellClick(object sender, DataGridViewCellEventArgs e)
{
var rowIndex = e.RowIndex;
var columnIndex = e.ColumnIndex; // = the cell the user clicked in
// For example, fetching data from another cell
var cell = dataGridView.Rows[rowIndex].Cells[columnIndex];
// Depending on the cell's type* (see a list of them here: http://msdn.microsoft.com/en-us/library/bxt3k60s(v=vs.80).ASPX) you could cast it
var castedCell = cell as DataGridViewTextBoxColumn;
// Use the cell to perform action
someActionMethod(castedCell.Property);
}
(*DataGridViewCell types: http://msdn.microsoft.com/en-us/library/bxt3k60s(v=vs.80).ASPX)

Disable default cell selection in datagridView

I have DataGridView to load some data programmatically. After inserting my data I am showing the DataGridView . Here by default the 1st row 0th column cell is selected. But I don't need that. I have tried to disable that option.
datagridviewname.currentcell=null
But it will not work. Any body can help me to solve my problem.

Set CurrentCell Selected property to False like:
dataGridViewName.CurrentCell.Selected = false;

On the DataGridView create an event for DataBindingComplete then add this method datagridview1.ClearSelection()
private void datagridview1_DataBindingComplete(object sender, EventArgs e)
{
datagridview1.ClearSelection();
}

Why u set it null? It should be like following. I think it will work
dataGridViewName.Rows[0].Cells[0].Selected = false;
if it is 1st row 0th, then
dataGridViewName.Rows[1].Cells[0].Selected = false;

The only way is this:
private void dataGridView_SelectionChanged(object sender, EventArgs e)
{
dataGridView.ClearSelection();
}

You should perform clear selection inside form load event of the form instead of constructor.
private void Form1_Load(object sender, EventArgs e)
{
// You will get selectedCells count 1 here
DataGridViewSelectedCellCollection selectedCells = dataGridView.SelectedCells;
// Call clearSelection
dataGridView.ClearSelection();
// Now You will get selectedCells count 0 here
selectedCells = dataGridViewSchedule.SelectedCells;
}

MSDN
You can set this property to null to temporarily remove the focus rectangle, but when the control receives focus and the value of this property is null, it is automatically set to the value of the FirstDisplayedCell property.
So looks like setting it to null only works if it wasn't the first row first column cell.

How to transfer data from gridview to textbox

Suppose if I say I have selected a row in gridview and want that row to come up in to their respective textboxes. For example, I have selected a row which has First Name and Last Names and on selection of row, the data from gridview should come in to textbox on winform. Please tell me.
I am guess it is something based on selection changed event if I am right ? Like below:
private void dgv_SelectionChanged(object sender, EventArgs e)
{
string str = txtFirstName.Text;
DataGridViewRow selectedRow;
}

If I got your question right, your solution is to use DataGridView.SelectedRows Property along with DataGridView.SelectionChanged Event
DataGridView.SelectedRows Gets the collection of rows selected by the
user.
DataGridView.SelectionChanged occurs whenever cells are selected or
the selection is canceled, whether programmatically or by user action.
private void dataGridView1_SelectionChanged(object sender, EventArgs e)
{
if (dataGridView1.SelectedRows.Count > 0)
{
foreach (DataGridViewRow row in dataGridView1.SelectedRows) {
//Send the first cell value into textbox'
Txt_FirstName.Text = row.Cells(0).Value.ToString; // or row.Cells["ColumnName"].Value;
}
}
}
MSDN and MSDN