datagridview数据绑定操作数据库实现增删改查

DataSet数据集，数据缓存在客户端内存中，支持断开式连接.DataGridView控件绑定DataSet时，它自动的改变的DS的行的状态,而且在做增删改查的时候，可以借助SqlCommandBuilder类来完成.

  SqlCommandBuilder必须执行SELECT命令来检索元数据，所以它要求多往返服务器一次，从而增加了应用程序的开销，而且操作的表必须要有主键约束。优点是自动建立insertcommand等命令

1,添加操作

  private void button2_Click(object sender, EventArgs e)

        {

            using (SqlConnection con = new SqlConnection(connstring))

            {

                con.Open();

                dapt = new SqlDataAdapter("select stucode,spcode,ctcode,stunits from stunits", con);

                SqlCommandBuilder sdb = new SqlCommandBuilder(dapt);

                DataSet ds1 = ds.GetChanges();

                if (ds.HasChanges())

                {

                    try

                    {

                        dapt.Update(ds, "stunit");

                        MessageBox.Show("保存成功", "提示");

                    }

                    catch (SqlException ex)

                    {

                        MessageBox.Show(ex.Message);

                    }

                }

               

            }

            this.dataGridView1.AllowUserToAddRows =false;

        }

2)删除操作(选中整行)

   private void 删除ToolStripMenuItem_Click(object sender, EventArgs e)

        {

            using (SqlConnection con = new SqlConnection(connstring))

            {

                //con.Open();

                StringBuilder sb  =new StringBuilder();

                sb.Append("delete stunits where stucode='"+this.dataGridView1.SelectedCells[0].Value.ToString()+"'");

                SqlCommand cmd = new SqlCommand(sb.ToString(), con);

                dapt.DeleteCommand = cmd;

                int rowindex = this.dataGridView1.CurrentCell.RowIndex;

                ds.Tables["stunit"].Rows[rowindex].Delete();//修改行的状态

               // string celltext = this.dataGridView1.SelectedCells[rowindex].Value.ToString();

               // MessageBox.Show(celltext);

                if(ds.HasChanges(DataRowState.Deleted))

                {

                     try

                    {

                        dapt.Update(ds, "stunit");

                        MessageBox.Show("删除成功", "提示");

                    }

                    catch (SqlException ex)

                    {

                        MessageBox.Show(ex.Message);

                    }

                }

            }

        }

2)删除操作(单击第一个单无格删除)

    private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)

        {

            if (e.ColumnIndex == 0 && e.RowIndex >= 0)

            {

                using (conn = new SqlConnection(con))

                {

                    conn.Open();

                    StringBuilder sb = new StringBuilder();

                    sb.Append("delete zy_bbxmxx where 代码='" + this.dataGridView1.Rows[e.RowIndex].Cells[1].Value.ToString()+"'");

                    //MessageBox.Show(sb.ToString());

                    dapt.DeleteCommand = new SqlCommand(sb.ToString(), conn);

                    DialogResult answer = MessageBox.Show("是否删除", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Exclamation);

                    if (answer == DialogResult.Yes)

                    {

                        try

                        {

                            ds.Tables[0].Rows[e.RowIndex].Delete();//改变行的状态

                            dapt.Update(ds, "zy_bbxx");

                            MessageBox.Show("删除成功");

                        }

                        catch (SqlException ex)

                        {

                            

                            MessageBox.Show(ex.Message);

                        }

                       

                    }

                }

            }

        } 

        

3)修改操作

 private void 修改ToolStripMenuItem_Click(object sender, EventArgs e)

        {

            using (SqlConnection con = new SqlConnection(connstring))

            {

                con.Open();

                //DataSet ds1 = ds.GetChanges();

                dapt = new SqlDataAdapter("select stucode,spcode,ctcode,stunits from stunits", con);

                SqlCommandBuilder sdb = new SqlCommandBuilder(dapt);

                if (ds.HasChanges())

                {

                    try

                    {

                        dapt.Update(ds, "stunit");

                        MessageBox.Show("修改成功","提示");

                    }

                    catch (SqlException ex)

                    {

                        MessageBox.Show(ex.Message);

                    }

                }

            }

或者

 private void btnEdit_Click(object sender, EventArgs e)

        {

            using (SqlConnection conn=new SqlConnection(con))

            {

                DataSet ds1 = ds.GetChanges();//得到修改后的DataSet

                if (ds1 != null)

                {

                    try

                    {

                        dapt = new SqlDataAdapter("select * from zy_bbxmxx", conn);

                        SqlCommandBuilder sb = new SqlCommandBuilder(dapt);        

                        dapt.Update(ds,"zy_bbxx");

                        MessageBox.Show("修改成功");

                     

                    }

                    catch (ArgumentNullException ex)

                    {

                        MessageBox.Show(ex.Message);

                    }

                

                }

            }  

        }

4）查询操作

  private void textBox5_TextChanged(object sender, EventArgs e)

        {

            this.dataGridView2.DataSource = ds.Tables[1];

                DataView dv = ds.Tables[1].DefaultView;

                dv.RowFilter = "stucode like   '" + '%' + this.textBox5.Text + '%' + "'";

                this.dataGridView2.DataSource = ds.Tables[1];

      }