private void Form1_Load(object sender, EventArgs e) { dropdownEdit1.IsExpandOnEdit = chkIsExpandOnEdit.Checked; dropdownEdit1.IsApplyRowFilter = chkIsApplyRowFilter.Checked; dropdownEdit1.IsAutoSelect = chkIsAutoSelect.Checked; dropdownEdit1.IsHighlightKeyword = chkIsHighlightKeyword.Checked; int width = Convert.ToInt32(txtDropdownWidth.Text.Trim()); dropdownEdit1.DropdownWidth = width; int height = Convert.ToInt32(txtDropdownHeight.Text.Trim()); dropdownEdit1.DropdownHeight = height; foreach (DataColumn col in MockData.Columns) { cmbDisplayMember.Items.Add(col.ColumnName); } cmbDisplayMember.SelectedIndex = 0; dropdownEdit1.DisplayMember = cmbDisplayMember.Text; dropdownEdit1.DataSource = MockData; dropdownEdit1.Focus(); gridControl1.DataSource = MockData; repositoryItemDropdownEdit2.DataSource = MockData.Copy(); }