DataGridViewComboBoxColumn 使用

用于编辑单元格时间时发生

private void dgvBreed_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
        {
            EditingControl = e.Control;

            if (e.Control.GetType() == typeof(DataGridViewComboBoxEditingControl))
            {
                ComboBox cmb = (ComboBox)e.Control;

                if (cmb.Tag == null)
                {
                    cmb.SelectedIndexChanged += new EventHandler(InformHandle_SelectedIndexChanged);
                }

                cmb.Tag = dgvBreed.CurrentRow.Index;
            }
            else if (dgvBreed.Columns[dgvBreed.CurrentCell.ColumnIndex].Name == "报价")
            {
                TextBox txt = (TextBox)e.Control;

                txt.KeyDown += new KeyEventHandler(dgvBreed_KeyDown);
            }
           
        }

private void InformHandle_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (!IsLockCombox)
            {
                DataGridViewRow row = ((DataGridView)((System.Windows.Forms.Control)sender).Parent.Parent).CurrentRow;
                ComboBox cmb = (ComboBox)sender;

                if (cmb.SelectedValue != null && int.Parse(cmb.Tag.ToString()) == dgvBreed.CurrentRow.Index)
                {
                    string OldValue = dgvBreed.CurrentCell.Value.ToString();
                    string NewValue = cmb.SelectedValue.ToString();
                    if (OldValue != NewValue )
                    {
                        switch (NewValue)
                        {
                            #region 替代品种
                            case "替代品种":
                                {
                                   
                         
                                   
                                    BreedReplace breedreplace = new BreedReplace();

                                    breedreplace.ShowDialog();

                                    if (breedreplace.ReplaceID != -1)
                                    {
                                        DataTable dt = DataManage.getDataLib(DataLibtype.InformBreed);
                                        //dt.Columns.Remove("库存");
                                        DataRow[] dr = dt.Select("采购品种编号 = " + row.Cells["采购品种编号"].Value.ToString(), "", DataViewRowState.CurrentRows);
                                        if (dr.Length > 0)
                                        {
                                            if (dt保存信息.Select("采购品种编号 = " + row.Cells["采购品种编号"].Value.ToString() + "and 库存 = '"+OldValue+"'", "", DataViewRowState.CurrentRows).Length <= 0)
                                                dt保存信息.Rows.Add(dr[0].ItemArray);
                                        }

                                        row.Cells["中包报价"].Value = 0;
                                        row.Cells["报价"].Value = 0;
                                        row.Cells["数量"].Value = 0;
                                        row.Cells["件数"].Value = 0;
                                        row.Cells["中包数量"].Value = 0;

                                        row.Cells["销售品种编号"].Value = breedreplace.ReplaceID;
                                        row.Cells["销售品种"].Value = breedreplace.ReplaceName;
                                        row.Cells["包装"].Value = breedreplace.S包装;
                                        row.Cells["中包装"].Value = breedreplace.S中包装;
                                    }
                                    else
                                    {
                                        IsLockCombox = true;

                                        for (int i = 0; i < cmb.Items.Count; i++)
                                        {
                                            if (cmb.Items[i].ToString().Equals(OldValue))
                                            {
                                                cmb.SelectedIndex = i;
                                                break;
                                            }
                                        }

                                        IsLockCombox = false;
                                    }

                                    break;
                                }
                            #endregion

                            #region 正常
                            case "正常":

                                if (OldValue == "替代品种")
                                {

                                    DataTable dt = DataManage.getDataLib(DataLibtype.InformBreed);//.Rows.Add(dr[0].ItemArray);
                                    DataRow[] dr = dt保存信息.Select("采购品种编号 = " + row.Cells["采购品种编号"].Value.ToString() + "and 库存 = '正常'", "", DataViewRowState.CurrentRows);
                                    DataRow[] drr = dt.Select("采购品种编号 = " + row.Cells["采购品种编号"].Value.ToString(), "", DataViewRowState.CurrentRows);
                                    if (dr.Length > 0)
                                    {
                                        drr[0]["采购数量"] = dr[0]["采购数量"];
                                        drr[0]["采购件数"] = dr[0]["采购件数"];
                                        drr[0]["采购中包数量"] = dr[0]["采购中包数量"];
                                        drr[0]["数量"] = dr[0]["数量"];
                                        drr[0]["件数"] = dr[0]["件数"];
                                        drr[0]["中包数量"] = dr[0]["中包数量"];

                                        drr[0]["报价"] = dr[0]["报价"];
                                        drr[0]["中包报价"] = dr[0]["中包报价"];
                                    }

                                    drr[0]["销售品种编号"] = row.Cells["采购品种编号"].Value;
                                    drr[0]["销售品种"] = 0;

                                }
                                else
                                {
                                    DataTable dt = DataManage.getDataLib(DataLibtype.InformBreed);
                                    DataRow[] drr = dt.Select("采购品种编号 = " + row.Cells["采购品种编号"].Value.ToString(), "", DataViewRowState.CurrentRows);
                                    if (drr.Length > 0)
                                    {
                                        drr[0]["数量"] = drr[0]["采购数量"].ToString();
                                        drr[0]["件数"] = drr[0]["采购件数"].ToString();
                                        drr[0]["中包数量"] = drr[0]["采购中包数量"].ToString();
                                      
                                    }
                                }

                                break;
                            #endregion

                            #region 不足
                            case "不足":
                       
                                if (OldValue == "替代品种")
                                {
                                    DataTable dt = DataManage.getDataLib(DataLibtype.InformBreed);
                                    DataRow[] dr = dt保存信息.Select("采购品种编号 = " + row.Cells["采购品种编号"].Value + "and 库存 = '不足'", "", DataViewRowState.CurrentRows);
                                    DataRow[] drr = dt.Select("采购品种编号 = " + row.Cells["采购品种编号"].Value.ToString(), "", DataViewRowState.CurrentRows);

                                    if (dr.Length > 0)
                                    {
                                        drr[0]["采购数量"] = dr[0]["采购数量"];
                                        drr[0]["采购件数"] = dr[0]["采购件数"];
                                        drr[0]["采购中包数量"] = dr[0]["采购中包数量"];
                                        drr[0]["数量"] = dr[0]["数量"];
                                        drr[0]["件数"] = dr[0]["件数"];
                                        drr[0]["中包数量"] = dr[0]["中包数量"];

                                        drr[0]["报价"] = dr[0]["报价"];
                                        drr[0]["中包报价"] = dr[0]["中包报价"];
                                    }

                                    row.Cells["销售品种编号"].Value = row.Cells["采购品种编号"].Value;
                                    row.Cells["销售品种"].Value = "";

                                }
                                row.Cells["数量"].Value = row.Cells["采购数量"].Value.ToString();
                                row.Cells["件数"].Value = row.Cells["采购件数"].Value.ToString();
                                break;

                            case "断货":
                                row.Cells["数量"].Value = 0;
                                row.Cells["件数"].Value = 0;
                                row.Cells["中包数量"].Value = 0;
                                break;
                            case "不经营":
                                row.Cells["数量"].Value = 0;
                                row.Cells["件数"].Value = 0;
                                row.Cells["中包数量"].Value = 0;
                                break;

                            #endregion

                            default:

                                break;
                        }
                    }
                }
               
                dgvBreed.Refresh();
            }
        }

http://hi.baidu.com/loveliulin09/blog/item/291504ca57178116bf09e658.html

http://topic.csdn.net/u/20070514/14/611b191f-eff4-423f-9c9b-29977f26482f.html

http://blog.csdn.net/freeliver54/archive/2009/10/27/4735848.aspx

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace Sys
{
    public partial class Form3 : Form
    {
        public Form3()
        {
            InitializeComponent();
        }

        private void Form3_Load(object sender, EventArgs e)
        {
            dataGridView1.AllowUserToAddRows = false;
            dataGridView1.AutoGenerateColumns = false;

            using (SqlConnection sqlconn = new SqlConnection("server=.;uid=sa;pwd=sa;database=xx"))
            {
                string sql1 = @"select userid,fullname,a.[description],b.ugroupid
                                from users a left outer join usergroup b
                                on a.grade=b.ugroupid";
                string sql2 = "select distinct ugroupid,[description] from usergroup";

                DataGridViewComboBoxColumn dgvComboBoxColumn = dataGridView1.Columns["grade"] as DataGridViewComboBoxColumn;
                dgvComboBoxColumn.DataPropertyName = "ugroupid";
                dgvComboBoxColumn.DataSource = GetTable(sql2).DefaultView;//必须在设置dataGridView1的DataSource的属性前设置
                dgvComboBoxColumn.DisplayMember = "description";
                dgvComboBoxColumn.ValueMember = "ugroupid";

                dataGridView1.DataSource = GetTable(sql1).DefaultView;//一定要在dgvComboBoxColumn的DataSource后设置
            }
        }

        private DataTable GetTable(string sql)
        {
            using (SqlConnection sqlconn = new SqlConnection("server=.;uid=sa;pwd=yuling1310;database=smls"))
            {
                DataTable dt = new DataTable();
                SqlDataAdapter sqlda = new SqlDataAdapter(sql, sqlconn);
                sqlda.Fill(dt);
                return dt;
            }
        }
    }
}

注意事项：
.注意其ValueMember的DataType与DataPropertyName对应的列的DataType要相同，他不会为你做类型转换的。
2.编程设置显示样式时注意一定要在设置DataSource之前设置DataGridViewComboBoxColumn的DataSource等属性。

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/freeliver54/archive/2009/10/27/4735848.aspx