datagridview 上增删改

1.删除

 private void button3_Click(object sender, EventArgs e)//删除
        {
            try
            {
                #region
                //foreach (DataGridViewRow dgvRow in dataGridView1.SelectedRows)
                //{
                //    dataGridView1.Rows.Remove(dgvRow);
                //}
                //sda.Update(dt);
                // MessageBox.Show("记录删除成功！","信息提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
                #endregion
                conn = new SqlConnection("database=test;server=(local);integrated security=true");
                string sql = "delete from Table1 where 学号='" + this.dataGridView1.CurrentRow.Cells["学号"].Value.ToString().Trim() + "'";
                conn.Open();
                cmd = new SqlCommand(sql, conn);
                cmd.ExecuteNonQuery();
                conn.Close();
                MessageBox.Show("记录删除成功！", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                sda = new SqlDataAdapter("select * from Table1", conn);
                scb = new SqlCommandBuilder(sda);
                dt = new DataTable("Table1");
                try
                {
                    sda.Fill(dt);

                    dt.PrimaryKey = new DataColumn[] { dt.Columns[0] };
                    dataGridView1.DataSource = dt;
                    dataGridView1.AlternatingRowsDefaultCellStyle.BackColor = Color.LightBlue;
                }
                catch (SqlException ex)
                {
                    MessageBox.Show(ex.ToString());
                }
              
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "删除不成功！");
            }
        }

2.修改

private void button5_Click(object sender, EventArgs e)//修改
        {
            string sql = "update Table1 set 姓名='" + this.dataGridView1.CurrentRow.Cells["姓名"].Value.ToString().Trim() + "'," +
                "性别='" + this.dataGridView1.CurrentRow.Cells["性别"].Value.ToString().Trim() + "'," +
                "年龄='" + this.dataGridView1.CurrentRow.Cells["年龄"].Value + "'," +
                "家庭地址='" + this.dataGridView1.CurrentRow.Cells["家庭地址"].Value.ToString().Trim() + "'"+
                "where 学号='"+this.dataGridView1.CurrentRow.Cells["学号"].Value.ToString().Trim()+"'";
            conn.Open();
            cmd = new SqlCommand(sql,conn);
            cmd.ExecuteNonQuery();
            conn.Close();
            MessageBox.Show("修改成功！","提示");
        }

3.保存

 private void button4_Click(object sender, EventArgs e)//保存
        {
            string sql1 = "insert into Table1 values(@学号,@姓名,@性别,@年龄,@家庭地址)";
            btnsummit(sql1);
            conn.Close();
            MessageBox.Show("添加库房信息成功！", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
        }

4.函数

  #region 新增函数
        private void btnsummit(string sql)
        {
            //将命令类型转为存储类型
            conn = new SqlConnection("database=test;server=(local);integrated security=true");
            conn.Open();
            //利用Command对象调用存储过程
            cmd = new SqlCommand(sql, conn);
            cmd.CommandType = CommandType.Text;
            //往存储过程中添加参数
            cmd.Parameters.Add("@学号", SqlDbType.NVarChar, 12);
            cmd.Parameters.Add("@姓名", SqlDbType.NVarChar, 8);
            cmd.Parameters.Add("@性别", SqlDbType.NVarChar, 10);
            cmd.Parameters.Add("@年龄", SqlDbType.Int);
            cmd.Parameters.Add("@家庭地址", SqlDbType.NVarChar, 50);
            //给存储过程的参数付值
            cmd.Parameters["@学号"].Value = this.dataGridView1.CurrentRow.Cells["学号"].Value.ToString().Trim();
            cmd.Parameters["@姓名"].Value = this.dataGridView1.CurrentRow.Cells["姓名"].Value.ToString().Trim();
            cmd.Parameters["@性别"].Value = this.dataGridView1.CurrentRow.Cells["性别"].Value.ToString().Trim();
            cmd.Parameters["@年龄"].Value = this.dataGridView1.CurrentRow.Cells["年龄"].Value.ToString().Trim();
            cmd.Parameters["@家庭地址"].Value = this.dataGridView1.CurrentRow.Cells["家庭地址"].Value.ToString().Trim();
            cmd.ExecuteNonQuery();//判断修改成功
        }
        #endregion