我已经连接好了数据库，而且数据显示在了datageidview表格中。现在我在datagridview中修改了几个表格数据，怎么将修改的数据更新的数据库啊？

private void btnName_Click(object sender, EventArgs e)
        {
            if (textBox1.Text.ToString() == "")
            {
                MessageBox.Show("请输入要更改的数据");
            }
            else
                if (textBox1.Text.Trim().ToString() != null)
                {
                    try
                    {
                        connection.Open();
                        string updatasql = "update student set 姓名='" + textBox1.Text + "'where 学号='" + name + "'";
                        string selectsql = string.Format("select 姓名,性别,出生日期,出生地,民族,毕业学校 from student where 学号='{0}'", name);
                        command = new SqlCommand(updatasql, connection);
                        if (command.ExecuteNonQuery() == 1)
                        {
                            MessageBox.Show("更新成功");
                            textBox1.Text = "";
                        }
                        else
                            MessageBox.Show("更新失败");
                        connection.Close();
                        adapter = new SqlDataAdapter(selectsql, connection);
                        dataset = new DataSet();
                        adapter.Fill(dataset);
                        dataGridViewShow.DataSource = dataset.Tables[0];
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(ex.Message);
                    }
                }
        }我自己的一个例子，希望你看的懂

string updatasql = "update student set 姓名='" + textBox1.Text + "'where 学号='" + name + "'";
                        string selectsql = string.Format("select 姓名,性别,出生日期,出生地,民族,毕业学校 from student where 学号='{0}'", name);
这两句不是很明白

就是执行你要更新的地方，再把更新过后的数据库显示出来！

2楼真犀利~~~~~~