看了一篇介绍如何自定义datagridview列的文章，写了一个可输入的combobox列

这篇文章介绍了定制列：构建DataGridView的定制NumericUpDown单元格(Cell)和表格列(Column)

 

下面是可输入的combobox列的代码，将其保存到项目的cs文件中，在datagridview控件的列属性中ColumnType里就可以到DataGridViewMyComboBoxColumn供选择了。

 

 

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; namespace Converter.sys { #region C# DataGridView combobox可编辑；由于用户可输入任何值，所以不区分值和显示值 /// <summary> /// /// </summary> public class DataGridViewMyComboBoxColumn : DataGridViewComboBoxColumn { public DataGridViewMyComboBoxColumn() { DataGridViewMyComboEditBoxCell obj = new DataGridViewMyComboEditBoxCell(); this.CellTemplate = obj; } } public class DataGridViewMyComboEditBoxCell : DataGridViewComboBoxCell { public override void InitializeEditingControl(int rowIndex, object initialFormattedValue, DataGridViewCellStyle dataGridViewCellStyle) { base.InitializeEditingControl(rowIndex, initialFormattedValue, dataGridViewCellStyle); ComboBox comboBox = (ComboBox)base.DataGridView.EditingControl; if (comboBox != null) { comboBox.DropDownStyle = ComboBoxStyle.DropDown; comboBox.AutoCompleteMode = AutoCompleteMode.Suggest; } } protected override object GetFormattedValue(object value, int rowIndex, ref DataGridViewCellStyle cellStyle, TypeConverter valueTypeConverter, TypeConverter formattedValueTypeConverter, DataGridViewDataErrorContexts context) { return value; } public override Type EditType { get { return typeof(DataGridViewMyComboBoxEditingControl); } } public override object ParseFormattedValue(object formattedValue, DataGridViewCellStyle cellStyle, TypeConverter formattedValueTypeConverter, TypeConverter valueTypeConverter) { return formattedValue; } } public class DataGridViewMyComboBoxEditingControl : DataGridViewComboBoxEditingControl { // The grid that owns this editing control //private DataGridView dataGridView; // Stores whether the editing control's value has changed or not private bool valueChanged=false; /// <summary> /// Property which indicates whether the value of the editing control has changed or not /// </summary> public override bool EditingControlValueChanged { get { return this.valueChanged; } set { this.valueChanged = value; } } protected override void OnValidating(CancelEventArgs e) { } /// <summary> /// Returns the current value of the editing control. /// </summary> public override object GetEditingControlFormattedValue(DataGridViewDataErrorContexts context) { return this.Text; } /// <summary> /// Property which represents the current formatted value of the editing control /// </summary> public override object EditingControlFormattedValue { get { return GetEditingControlFormattedValue(DataGridViewDataErrorContexts.Formatting); } set { string newValue = value as string; if (newValue != null) { this.Text = newValue; } } } /// <summary> /// Listen to the KeyPress notification to know when the value changed, and /// notify the grid of the change. /// </summary> protected override void OnKeyPress(KeyPressEventArgs e) { base.OnKeyPress(e); if (true) { NotifyDataGridViewOfValueChange(); // Let the DataGridView know about the value change } } /// <summary> /// Small utility function that updates the local dirty state and /// notifies the grid of the value change. /// </summary> private void NotifyDataGridViewOfValueChange() { if (!this.valueChanged) { this.valueChanged = true; if (this.EditingControlDataGridView != null) { this.EditingControlDataGridView.NotifyCurrentCellDirty(true); } } } } #endregion }

 

本文中的代码或引用的代码仅供学习讨论之用，未经严格测试。