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Removing the default selected row on datagridview

i have a Datagridview that contains columns.
when i click on the item on the column.
it always select the first row
i also tried
.currentcell = null and .clearselection();
// i inserted this one on the form_load
but nothing happens.
here is my code
private void dgv1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
if (e.ColumnIndex == 0)
{
dgv1.CurrentCell = null;
dgv1[e.ColumnIndex, e.RowIndex].Value.ToString();
if (Path.GetExtension(path) == ".pdf")
{
Process.Start(path);
}
}
}

What do you want the user to select in the first place?
There is a property for selectionmode in datagridview.
Change it to CellSelect if you want it to select cells only.
Alternatively, use dataGridView.SelectionMode = DataGridViewSelectionMode.CellSelect;
After reading what you said on the comment, from that I infer that you are trying to click a cell and read the cell from your program?
If so, you could try
dataGridView[e.ColumnIndex, e.RowIndex].Value.ToString();
on the CellContentClick and/or CellClick event

How do I execute code after a certain checkbox is selected

I have a datagridview with multiple checkboxes. When the Finished checkbox is checked I need to execute linq code to update a specific table. How do I find out if that specific check box is dirty and where do I write the code to pass the values I need to be passed to the table. Note that it is not the same table that the datagridview is based on.
Thanks.
EDIT:
private void propertyInformationDataGridView_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
DataGridViewCheckBoxCell checkCell = (DataGridViewCheckBoxCell)propertyInformationDataGridView.Rows[e.RowIndex].Cells[3];
DataGridViewRow row = propertyInformationDataGridView.Rows[e.RowIndex] as DataGridViewRow;
System.Data.DataRowView SelectedRowView;
newCityCollectionDataSet.PropertyInformationRow SelectedRow;
SelectedRowView = (System.Data.DataRowView)propertyInformationBindingSource.Current;
SelectedRow = (newCityCollectionDataSet.PropertyInformationRow)SelectedRowView.Row;
if (Convert.ToBoolean(checkCell.EditedFormattedValue) == true)
{
DataClasses1DataContext dc = new DataClasses1DataContext();
var matchedCaseNumber = (from c in dc.GetTable<PropertyInformation>()
where c.CaseNumberKey == SelectedRow.CaseNumberKey
select c).SingleOrDefault();
reportsSent newReport = new reportsSent();
newReport.CaseNumberKey = SelectedRow.CaseNumberKey;
dc.reportsSents.InsertOnSubmit(newReport);
dc.SubmitChanges();
}
}
Do I need to endedit at some point is that the issue?

This is from some of my code, all you need to do is create a "CellContentClick" event for your datagridview.
The easiest way to do this is select the Datagridview, go to properties and click on the lightning bolt. Scroll down to "CellContentClick" and double click in the empty box. This will auto generate the method you need to paste the following code into.
Make sure you rename my instances of "CustomersDataGridView" to whatever yours is named as well, intellisense should highlight invalid code in red that you need to replace.
Also, the "9" you see in the checkCell declaration needs to be changed to the index of your "Finished" check-box. If it is in the 3rd cell from the left, put a 2 there instead of a 9, as the indexing is 0 based.
EDITTED to fix comments:
private void CustomersDataGridView_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
if (e.ColumnIndex.ToString() == "9")
{
DataGridViewCheckBoxCell checkCell = (DataGridViewCheckBoxCell)CustomersDataGridView.Rows[e.RowIndex].Cells[9];
DataGridViewRow row = CustomersDataGridView.Rows[e.RowIndex] as DataGridViewRow;
if (Convert.ToBoolean(checkCell.EditedFormattedValue) && CustomersDataGridView.IsCurrentCellDirty)
{
//Do Work here.
var z = row.Cells[0].Value; // Fill in the brackets with the column you want to fetch values from
//z in this case would be the value of whatever was in the first cell in the row of the checkbox I clicked
}
}
}

You can do it in the CheckedChanged-Event
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
// Do what you have to do...
}

Checkbox in datagrid view doesn't update my bindingList

I have a datagrid with 2 columns. One is a checkbox and one is a normal textbox cell. All is bound to one BindingList which is an entity.
If I check one checkbox and then loop to get the checked entities from the BindingList, it returns nothing. But if I check then edit the textbox column, it works just fine and return one result.
I tried to refresh or to check then click somewhere else. It doesn't work.
How do you manage to get your bindingList updated when you check a column?
Thank you!

What data type is the column in the data source (dataTable)? Is it boolean type?
But this doesnt matter so much, what matters is that you use the correct event of the dgv.
Use:
1. CurrentCellDirtyStateChanged and
2. CellValueChanged
This is the code you have to use:
private void CreateAndBind()
{
DataTable table = GetDataToDataTable();
//then bind it to dgv:
dgv.DataSource = new BindingSource(table, null);
//create events for dgv:
dgv.CurrentCellDirtyStateChanged += new EventHandler(dgv_CurrentCellDirtyStateChanged);
dgv.CellValueChanged += new EventHandler(dgv_CellValueChanged);
}
private DataTable GetDataToDataTable()
{
//get data from dataBase, or what ever...
table.Columns.Add("column1", typeof(stirng));
table.Columns.Add("column2", typeof(bool));
//adding some exmaple rows:
table.Rows.Add("item 1", true);
table.Rows.Add("item 2", false);
return table;
}
void dgv_CurrentCellDirtyStateChanged(object sender, EventArgs e)
{
if (dataGridView1.IsCurrentCellDirty)
dataGridView1.CommitEdit(DataGridViewDataErrorContexts.Commit);
}
private void dgv_CellValueChanged(object obj, DataGridViewCellEventArgs e)
{
if (e.ColumnIndex == 0) //compare to checkBox column index
{
DataGridViewCheckBoxCell check = dataGridView1[0, e.RowIndex] as DataGridViewCheckBoxCell;
if (Convert.ToBoolean(check.Value) == true)
{
//If tick is added!
//
}
}
}
Hope it helps.

DataGridView Check Box selection

I added datagridview to my win forms app and I also added one CheckBox for marking rows.
The CheckBox works as I expected until the user sorts the DataGridView. After the sort the previous selection of checkbox column is lost.
Is there a way I can make my datagridview remember which row is selected after sorting?

You have two options to solve this issue.
The first and possibly the most simple is to bind your checkbox column to your datasource. For example, if you are using a DataTable as your datasource, adding a boolean column will create a checkbox on your DataGridView that will sort and not lose the checked state.
If this is not an option then the other way of addressing the problem is to set your DataGridView to Virtual mode and maintain a cache of your checkbox values.
Check out the excellent DataGridView FAQ for an example of how to do this. I've also provided the code below but do check out the FAQ:
private System.Collections.Generic.Dictionary<int, bool> checkState;
private void Form1_Load(object sender, EventArgs e)
{
dataGridView1.AutoGenerateColumns = false;
dataGridView1.DataSource = customerOrdersBindingSource;
// The check box column will be virtual.
dataGridView1.VirtualMode = true;
dataGridView1.Columns.Insert(0, new DataGridViewCheckBoxColumn());
// Initialize the dictionary that contains the boolean check state.
checkState = new Dictionary<int, bool>();
}
private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
// Update the status bar when the cell value changes.
if (e.ColumnIndex == 0 && e.RowIndex != -1)
{
// Get the orderID from the OrderID column.
int orderID = (int)dataGridView1.Rows[e.RowIndex].Cells["OrderID"].Value;
checkState[orderID] = (bool)dataGridView1.Rows[e.RowIndex].Cells[0].Value;
}
}
private void dataGridView1_CellValueNeeded(object sender, DataGridViewCellValueEventArgs e)
{
// Handle the notification that the value for a cell in the virtual column
// is needed. Get the value from the dictionary if the key exists.
if (e.ColumnIndex == 0)
{
int orderID = (int)dataGridView1.Rows[e.RowIndex].Cells["OrderID"].Value;
if (checkState.ContainsKey(orderID))
e.Value = checkState[orderID];
else
e.Value = false;
}
}
private void dataGridView1_CellValuePushed(object sender, DataGridViewCellValueEventArgs e)
{
// Handle the notification that the value for a cell in the virtual column
// needs to be pushed back to the dictionary.
if (e.ColumnIndex == 0)
{
// Get the orderID from the OrderID column.
int orderID = (int)dataGridView1.Rows[e.RowIndex].Cells["OrderID"].Value;
// Add or update the checked value to the dictionary depending on if the
// key (orderID) already exists.
if (!checkState.ContainsKey(orderID))
{
checkState.Add(orderID, (bool)e.Value);
}
else
checkState[orderID] = (bool)e.Value;
}
}

I'm surprised that that happens, but if there's no other way around it in a worst case you could set the sorting to programmatic and then handle when the user clicks on the column header, save a list of which items are checked, do the sorting programmatically and then check any items that should be checked.

C# dynamically taking data from DataGridView

I'm trying to get my current program to take information from a dynamically created DataGridView. I have managed to get the information into the grid, and perform the required search, however now I'm really stuck.
I have added a column to the datagridview which holds a button within each row. What I'd like to do is take the value of the data from column index 1 which is in the same row as the button clicked. Confusing? Anyway, here's the code:
public void GetValues(...)
{
//Details regarding connection, querying and inserting table
.
.
.
DataGridViewButtonColumn buttonCol = new DataGridViewButtonColumn();
buttonCol.Name = "ButtonColumn";
buttonCol.HeaderText = "Select";
buttonCol.Text = "Edit";
//NB: the text won't show up on the button. Any help there either?
dataGridView1.Columns.Add(buttonCol);
dataGridView1.CellClick += new DataGridViewCellEventHandler(dataGridView1_CellClick);
foreach (DataGridViewRow row in dataGridView1.Rows)
{
DataGridViewButtonCell button = (row.Cells["ButtonColumn"] as DataGridViewButtonCell);
}
dataGridView1.Columns["ButtonColumn"].DisplayIndex = 0;
}
void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
{
//Here is where I'm having the trouble. What do I put in here???
}
Thanks for any help you can give!
David.

Your DataGridViewCellEventArgs contains very useful information such as RowIndex.
So something like (I don't know what you want to do with the value):
String dataYouWant = dataGridView1.Rows[e.RowIndex].Cells[1].Value;

`
if (e.ColumnIndex != button_column_number) //column number of the button.
return;
dataGridView1.EndEdit();
bool val;
if ((dataGridView1.Rows[e.RowIndex].Cells[1].Value) != null) // column index 1...as that's what you want.
{
//d stuff you want here.
}
else
{
}
`