how to set the value of datagridview textbox i.e each row with textbox should contain some value (e.g in my case 0.0) and also if user doesn't enter any value it should set value 0.0.
I tried to use cellleave event of datagridview but its not helping...
what i am really want to do is set the certain default value in cell if user does not give any input. Once user lefts the current cell it should show the default value.
now this is my code
private void dgvSellbox_CellLeave(object sender, DataGridViewCellEventArgs e)
{
if (dgvSellbox.CurrentCell.Value == null )
{
dgvSellbox.CurrentCell.Value = 0.0;
}
}
You can set defaults for the a column by the designer
On you DataGridView -> Click Edit Columns
Now you should see the Edit Columsn Dialog
Select the Column you want to set default
Now at the right side you should the property called DataGridViewCellStyle
Please click on DataGridViewCellStyle this will show Cell Style Builder Dialog
Under Data -> Set the NullValue property to 0.0
Keep on clicking Ok Buttons till you are back to the DataGridView
Hope this helps...
Related
I'm trying to replicate this behavior in the ColumnMappings window from SQL Management Studio:
Image Here
When you click inside a destination cell, the type changes from text
to combobox (it seems), and when you leave the cell, it takes the selected value from the combobox and changes back to textboxCell with the value included.
It does this for every cell in that column.
So, when I load the data, all the cells are textbox, and when the user enters any cell in that column, I do this:
private void dgvwMapping_CellEnter(object sender, DataGridViewCellEventArgs e)
{
if (e.ColumnIndex == 1)
{
string txt = dgvwMapping[e.ColumnIndex, e.RowIndex].Value.ToString();
DataGridViewComboBoxCell cbbxDestination = new DataGridViewComboBoxCell() { DataSource = new List<string>(someList) };
cbbxDestination.Value = txt;
dgvwMapping[e.ColumnIndex, e.RowIndex] = cbbxDestination;
}
}
So far so good, if I change from cell to cell everything goes fine, except when I click the cell that has the coordinates [1,1]. The only one that throws the "Operation is not valid because it results in a reentrant call to the SetCurrentCellAddressCore" exception is the one with the columnIndex equal to the rowIndex.
I already tried wrapping the line where I reassign the Cell Type in an invoke call, like this:
dgvwMapping.BeginInvoke(new MethodInvoker(delegate ()
{
dgvwMapping[e.ColumnIndex, e.RowIndex] = cbbxDestination;
}));
But It loops indefinitely the event. Even wrapping all the code inside the event makes the event loop indefinitely.
I haven't coded anything inside the CellEndEdit or the CellLeave yet.
Does anyone have any advice? Perhaps my aproach at replicating that behavior is not the best.
Thanks
Your issue:
When you click inside a destination cell, the type changes from text to combobox (it seems), and when you leave the cell, it takes the selected value from the combobox and changes back to textboxCell with the value included.
is just a simple style setting for the DataGridViewComboBoxColumn property:
yourGridColumnComboBox.DisplayStyle = DataGridViewComboBoxDisplayStyle.Nothing;
This will make it appear like a TextBox, but when it has focus with selectable items, it will show the drop down button.
When i populate my datagridview the first cell in the datagridview is always blue. The data grid view is populated with DataGridViewTextBoxColumn. it's like I have pressed the cell but I have not.it is like that with every table I create. i dont want it to be blue, can somebody help?
By default, there's always a selection on a DataGridView. If you don't want it, you can do:
// hides the "blue"
theDataGridView.ClearSelection();
// hides the "focus rectangle"
theDataGridView.CurrentCell = null;
As soon as the control gets focused again, you'll have a focus rect though.
This is because by default the selection mode will be singlecell you can change that. Also in code behind you can set the dgGridView.SelectedIndex = -1
or clearselection like that
Remove blue colored row from DataGridView WinForms
dataGridView.ClearSelection();
and then set the current cell property to null
dataGridView.CurrentCell = null; // for no focus
The last column in my Datagrid is hyperlinked, every cell has an individual hyperlink. I want to be able to click on a cell, get the data within that cell, and using the hyperlink, redirect to another form, passing that data selected.
string AuditsRequired = (dgFake.Items[0] as DataRowView).Row.ItemArray[5].ToString();
xamlAllocteAudits AA = new xamlAllocteAudits(AuditsRequired);
AA.Show()
This is my first attempt at fetching the cell-data, however due to the code, I have specified a column and row, whereas I want the cell to be which ever cell I click, rather than specifying in code.
Here is my datagrid, showing the cells that have been hyperlinked:
http://i.stack.imgur.com/v7Uyw.png
If i understand your question correctly, you want to click on a cell and obtain the data from that cell. I suspect that the cellclicked event or currentcellchanged event are going to be the most useful to you for this task.
you could try something like
private void dgFake_CurrentCellChanged(object sender, EventArgs e)
{
int row = e.row;
int col = e.col;
if e.value !=null
{
string AuditsRequired = dgfake[row,col].value.tostring();
xamlAllocteAudits AA = new xamlAllocteAudits(AuditsRequired);
AA.Show()
}
}
You may or may not know this, but you can get VS to make this event method (or any event method) for you by clicking on the object (in your case the datagridviewer) in the designer and then clicking the events (little lightning bolt) icon in the properties window.
Hope that helps.
Cheers.
Work on Asp.Net C# VS08.
I have a GridView which was binded to an ObjectDataSource with edit command link capabilities enabled.
Whenever the user go on edit a row and changes a given cell, I'd like to change another cell value programatically change a cell value (according to the new cell value typed by the user).
So, is it possible to change cell values programatically on edit mode?
I took a gridview with Five columns. In first column i have edit buttons. In second column i have name and in third i have age,StartTime,EndTime.On my name cell i used PopupControlExtender,When user click on Name Cell they see a gridview popup containing Name And Age from there they chose appropriate name.After chose the name i want Age will be set Automatically on My Age cell.
Where to Write,How to write methods.On PopupControlExtender popup grid i can select and set value on name cell using the bellow code
protected void GridView2_SelectedIndexChanged(object sender, EventArgs e)
{
string b = ((Label)GridView2.SelectedRow.FindControl("lblCOM_NAME")).Text;
AjaxControlToolkit.PopupControlExtender.GetProxyForCurrentPopup( this.Page).Commit(b);
}
i want user click the name cell value after this age will be set automatically on Age cell from popup grid.How to set the Value?
Use a template column and then
row[0].Cell[0].FindControl("txtTextBox")
with the correct cast.
I dont have VS on this machine but that should be about right.
In a TextBox, I could use textBox1.SelectionStart = 4. How can I do this in a DataGridView?
edit for clarification: suppose a specific cell is already selected and in editing mode. If I push the right arrow key, the caret moves to the right one position over whatever text is in that cell. I wish to create a button that does the same thing.
You should probably clarify a bit. Do you mean to change the selected row in a DataGridView or is there a textbox in your DataGridView that you want to move the caret for?
If you're looking to modify the selected row, try the SelectedIndex property.
private void RadGridView1_SelectionChanged(object sender, Telerik.Windows.Controls.SelectionChangeEventArgs e)
{
RadGridView1.CurrentItem = RadGridView1.SelectedItem;
}
You need to get the TextBox via the DataGridView's EditingControlShowing event.
Store this is a member variable, and when you need to, access the textBox member and set the SelectionStart as you wrote above.
Something like;
dataGrid.EditingControlShowing += this.dataGrid_EditingControlShowing;
and
void dataGrid_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
if(this.dataGrid.CurrentCell != null && e.Control is TextBox)
{
this.currentTextBox = (TextBox)e.Control;
}
}
Whenever the user would click your button, the cell in the DataGridView would lose focus, so it will remove the edit box, validate the value, and put the formatted value in the cell.
I wonder what your reasons are for having a button move the caret?