I have a DataGridView that is populated using a list.
During Runtime, the user can filter the data by entering data in a textbox. I am able to do the filtering part.
But the problem i am facing is when i change the datasource to the new datasource in the Textbox1_TextChanged event, the datagridview is populating the data with rows equal to the number of rows in my new datasource but each row is replica of the first row.
When I check the DataSource of the datagridview it has the data of the new DataSource.
So when I check the row selected in the datagridview_doubleclick event, the DataBoundItem gives me the exact object that it should give according the to new datasource.
What might have gone wrong??
Maybe I am wrong, but do you need to clear the DataGridView when binding to a new datasource.... my binding skills are lacking....
Try clearing the DataGridView, before changing the datasource like :
DataGridView.Rows.Clear();
Related
I have a DataGridView that shows summary data. It is bound to a BindingSource which is bound to a DataTable. Depending on the summary type selected by the user, the program may split the data into multiple columns. In my code, I update the existing column and add columns as needed. The new column, as expected, gets added to the end of the list and I use SetOrdinal to reposition it. The DataGridView, however never moves the column unless I blank and rebind the DataSource to the BindingSource as follows:
I add columns with the following code:
this.Columns.Add(newcolumn);
this.Columns[columnname].SetOrdinal(index++);
And I refresh the source as follows:
teamstats.UpdateColumn(teamstats.Columns[columnClicked].ColumnName);
bsTBAstats.DataSource = null;
bsTBAstats.DataSource = teamstats;
This is problematic, as after I refresh the DataGridView, I have to reapply my formats (cell formts and event handlers) for each of the columns which slows down the process significantly.
Is there a more efficient way to have the DataTable refresh the column order? If the user can reorder the columns manually, why can't I do it programmatically?
The best way I've found to accomplish what I asked above is to manually resort the columns in the DataGridView to match the order of the columns in the DataTable. The following codes shows the process I used:
foreach (DataColumn c in teamstats.Columns)
dgvTBAstats.Columns[c.ColumnName].DisplayIndex = teamstats.Columns.IndexOf(c);
Seems as though the binding process should automate this, but this works. Unfortunately, if the user has manually reordered the columns, that order is lost since the opposite is true and the DataTable doesn't get reordered to match the DataGridView.
I can't seem to find a better way to bind the column order.
I have DataGrid and BindingSource connected with that DataGrid. One of the column in DataGrid is checkbox column.
My problem is that all rows are unchecked after change/apply new filter value on the BindingSource.
I wanna that my previous checked rows stay check.
Is it a possible without remembering checked rows and check them again after new filtering?
i have a dropdownlist in a column in a gridview. This dropdwon already had two items in it i.e Close/Open. What i require is that I bind the gridview to a dataset, all i want is for the dropdown to show the value that is in the dataset.(open or close)
I got the answer. Its a bit of an work around. You cannot directly bind the gridview dropdownlist to the dataset column. What I did instead was, I bound the Dataset column to a hiddenfield and then in Rowdatabound event i assigned the dropdown.selectedvalue to the hiddenfield.value.
Works Perfectly...Thanks everyone.
I am new to C#. How to Clear data in DataGridView?
I have some data in datagridview and I have one drop down box at every index changed
I want datagrid view will be changed. but I did not get the solution just i Added to
previous data can any one help
if you use data source to fill the grid use:
dataGridView1.DataSource=null;
dataGridView1.DataBind();
if you fill the grid programmatically use:
dataGridView1.Rows.Clear();
If you want the DataGridView change when the Dropdownlist change so u just reuse the Code grant value to Datagridview.
I work with a WinForms app.
I want to add one row to a DataGridView that this row must enter to database.
What event handler must I use to do this?
Is your DataGridView bound to that database? If so, you should be adding and deleting rows in that data source, not in the grid control itself. Try calling the AddNew method on the binding source.
If you're using a standalone DataGridView that isn't bound to a database, then you can call one of the many overloads of the Add method of the grid control's Rows collection.
This might help you out to add a row to the DataGridView:
http://msdn.microsoft.com/de-de/library/system.windows.forms.datagridview%28v=vs.80%29.aspx
If the DataGridView isn't bound to the database, try to bound it or write the data to the database programmatically.