DataGridView.Columns Property


Gets a collection that contains all the columns in the control.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public DataGridViewColumnCollection Columns { get; }

Property Value

Type: System.Windows.Forms.DataGridViewColumnCollection

The DataGridViewColumnCollection that contains all the columns in the DataGridView control.

By using the DataGridViewColumnCollection returned by this property, you can add columns, remove columns, and obtain a count of the columns contained in the DataGridView control. For more information, see DataGridViewColumnCollection.

The following code example demonstrates how to create an unbound DataGridView; set the ColumnHeadersVisible, ColumnHeadersDefaultCellStyle, and ColumnCount properties; and use the Rows and Columns properties. It also demonstrates how to use a version of the AutoResizeColumnHeadersHeight and AutoResizeRows methods to properly size the column headers and the rows. To run this example, paste the following code into a form that contains a DataGridView named dataGridView1 and a button named Button1, and then call the InitializeDataGridView method from the form's constructor or Load event handler. Ensure all events are connected with their event handlers.

   private void InitializeDataGridView()
       // Create an unbound DataGridView by declaring a column count.
       dataGridView1.ColumnCount = 4;
       dataGridView1.ColumnHeadersVisible = true;

       // Set the column header style.
       DataGridViewCellStyle columnHeaderStyle = new DataGridViewCellStyle();

       columnHeaderStyle.BackColor = Color.Beige;
       columnHeaderStyle.Font = new Font("Verdana", 10, FontStyle.Bold);
       dataGridView1.ColumnHeadersDefaultCellStyle = columnHeaderStyle;

       // Set the column header names.
       dataGridView1.Columns[0].Name = "Recipe";
       dataGridView1.Columns[1].Name = "Category";
       dataGridView1.Columns[2].Name = "Main Ingredients";
       dataGridView1.Columns[3].Name = "Rating";

       // Populate the rows.
       string[] row1 = new string[] { "Meatloaf", "Main Dish", "ground beef",
           "**" };
       string[] row2 = new string[] { "Key Lime Pie", "Dessert", 
           "lime juice, evaporated milk", "****" };
       string[] row3 = new string[] { "Orange-Salsa Pork Chops", "Main Dish", 
           "pork chops, salsa, orange juice", "****" };
       string[] row4 = new string[] { "Black Bean and Rice Salad", "Salad", 
           "black beans, brown rice", "****" };
       string[] row5 = new string[] { "Chocolate Cheesecake", "Dessert", 
           "cream cheese", "***" };
       string[] row6 = new string[] { "Black Bean Dip", "Appetizer", 
           "black beans, sour cream", "***" };
       object[] rows = new object[] { row1, row2, row3, row4, row5, row6 };

       foreach (string[] rowArray in rows)

   private void button1_Click(object sender, System.EventArgs e)
       // Resize the height of the column headers. 

       // Resize all the row heights to fit the contents of all non-header cells.

   private void InitializeContextMenu()
       // Create the menu item.
       ToolStripMenuItem getRecipe = new ToolStripMenuItem("Search for recipe", null,
           new System.EventHandler(ShortcutMenuClick));

       // Add the menu item to the shortcut menu.
       ContextMenuStrip recipeMenu = new ContextMenuStrip();

       // Set the shortcut menu for the first column.
       dataGridView1.Columns[0].ContextMenuStrip = recipeMenu;
       dataGridView1.MouseDown += new MouseEventHandler(dataGridView1_MouseDown);

   private DataGridViewCell clickedCell;

   private void dataGridView1_MouseDown(object sender, MouseEventArgs e)
// If the user right-clicks a cell, store it for use by the shortcut menu.
       if (e.Button == MouseButtons.Right)
           DataGridView.HitTestInfo hit = dataGridView1.HitTest(e.X, e.Y);
           if (hit.Type == DataGridViewHitTestType.Cell)
               clickedCell =

   private void ShortcutMenuClick(object sender, System.EventArgs e)
       if (clickedCell != null)
           //Retrieve the recipe name.
           string recipeName = (string)clickedCell.Value;

           //Search for the recipe.
               "" + recipeName);

.NET Framework
Available since 2.0
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