c# backgroundworker creating datagridview and creating columns

Question

I am getting this error "No row can be added to a DataGridView control that does not have columns. Columns must be added first." what am i doing wrong here?

        //create datagridview1
          DataGridView dataGridView1 = new DataGridView();

         // DataGridViewColumn column = new DataGridViewTextBoxColumn();

          // Initialize the DataGridView.
          dataGridView1.AutoGenerateColumns = false;
          dataGridView1.AutoSize = true;

          DataGridViewColumn column1 = new DataGridViewTextBoxColumn();
          column1.DataPropertyName = "Column1";
          column1.Name = "title";
          dataGridView1.Columns.Add(column1);

          DataGridViewColumn column2 = new DataGridViewTextBoxColumn();
          column2.DataPropertyName = "Column2";
          column2.Name = "imageurl";
          dataGridView1.Columns.Add(column2);

          DataGridViewColumn column3 = new DataGridViewTextBoxColumn();
          column3.DataPropertyName = "Column3";
          column3.Name = "videourl";
          dataGridView1.Columns.Add(column3);

          DataGridViewColumn column4 = new DataGridViewTextBoxColumn();
          column4.DataPropertyName = "Column4";
          column4.Name = "done";
          dataGridView1.Columns.Add(column4);

that code is directly underneath private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e) { — mxadam
– mxadam, Commented Feb 20, 2014 at 13:33
@mxadam Show the code that invokes backgroundWorker1.RunWorkerAsync();. It looks like a synchronization issue, could be that your thread is running before you add columns to your DataGrdiView. — etaiso
– etaiso, Commented Feb 20, 2014 at 14:41

Community · Accepted Answer · 2017-05-23 12:20:57Z

0

try

dataGridView1.Columns.Add("Column","Test");

or if you want to choose coulmn type

DataGridViewColumn  newCol = new DataGridViewColumn(); // add a column to the grid
DataGridViewCell cell = new DataGridViewCell(); //Specify which type of cell in this column
newCol.CellTemplate = cell;

newCol.HeaderText = "test2";
newCol.Name = "test2";
newCol.Visible = true;
newCol.Width = 40;

gridColors.Columns.Add(newCol);

from here

You also can see MSDN example

edited May 23, 2017 at 12:20

CommunityBot

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answered Feb 20, 2014 at 13:33

AsfK

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1 Comment

AsfK Over a year ago

@mxadam, strange. I verify it and it's work to me. Pay attention: Add function receivce 2 parameters. one is column name and the second is the header.

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