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DataGridViewComboBoxColumn.MaxDropDownItems Property

Gets or sets the maximum number of items in the drop-down list of the cells in the column.

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

public int MaxDropDownItems { get; set; }

Property Value

Type: System.Int32
The maximum number of drop-down list items, from 1 to 100. The default is 8.

ExceptionCondition
InvalidOperationException

The value of the CellTemplate property is null.

Getting or setting this property gets or sets the MaxDropDownItems property of the object returned by the CellTemplate property. Setting this property also sets the MaxDropDownItems property of every cell in the column. To override the specified value for individual cells, set the cell values after you set the column value.

The following code example demonstrates how to use a DataGridViewComboBoxColumn to aid in entering data into the TitleOfCourtesy column. This example is part of a larger example available in the DataGridViewComboBoxColumn class overview topic.

private static void SetAlternateChoicesUsingItems(
    DataGridViewComboBoxColumn comboboxColumn)
{
    comboboxColumn.Items.AddRange("Mr.", "Ms.", "Mrs.", "Dr.");
}

private DataGridViewComboBoxColumn CreateComboBoxColumn()
{
    DataGridViewComboBoxColumn column =
        new DataGridViewComboBoxColumn();
    {
        column.DataPropertyName = ColumnName.TitleOfCourtesy.ToString();
        column.HeaderText = ColumnName.TitleOfCourtesy.ToString();
        column.DropDownWidth = 160;
        column.Width = 90;
        column.MaxDropDownItems = 3;
        column.FlatStyle = FlatStyle.Flat;
    }
    return column;
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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