怎样将添加的数据在DataGridView中显示
本人现在有段程序，通过“添加”按钮，在各文本框中录入相关数据（学号，姓名，年级，性别），单击“保存”按钮，数据将保存到school数据库的student表中，现在希望将输入的相关数据在Form1窗体的DataGridView中显示出来，求知道的高手指点指点，不甚感激！以下是程序代码：using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
//using System.Linq;
using System.Data.SqlClient;
namespace SQL_luru_shujuku
{
public partial class Form1 : Form
{
SqlConnection con = new SqlConnection(@"server=.\SQLEXPRESS;integrated security
= true;database=school");
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
ControlInfo(false);
showinfo();
}
private void showinfo()
{
using (SqlDataAdapter da = new SqlDataAdapter("select * from student", con))
{
DataTable dt = new DataTable();
da.Fill(dt);
DataView dv = new DataView(dt);
this.dataGridView1.DataSource = dv;
}
}
private void tbADD_Click(object sender, EventArgs e)
{
ControlInfo(true);
this.tbSave.Enabled = true;
this.tbADD.Enabled = false;
}
private void ControlInfo(Boolean B)
{
foreach (Control ct in this.groupBox1.Controls)
{
if (ct is TextBox)
{
ct.Text = "";
if (B)
{
ct.Enabled = true;
}
else
{
ct.Enabled = false;
}
}
}
}
private void tbSave_Click(object sender, EventArgs e)
{
StringBuilder strSQL = new StringBuilder();
strSQL.Append("insert into student(sno, sname,sclass,ssex)");
strSQL.Append(" values('" + textBox1.Text.Trim().ToString() + "','" +
textBox2.Text.Trim().ToString() + "',");
strSQL.Append("'" + Convert.ToSingle(textBox3.Text.Trim().ToString()) +
"','" + textBox4.Text.Trim().ToString() + "')");
using (SqlCommand cmd = new SqlCommand(strSQL.ToString(), con))
{
con.Open();
// SqlDataReader dr = cmd.ExecuteReader();
cmd.ExecuteNonQuery();
MessageBox.Show("OK");
ControlInfo(false);
con.Close();
}
showinfo();
strSQL.Remove(0, strSQL.Length);
this.tbSave.Enabled = false;
this.tbADD.Enabled = true;
}
}
} --------------------编程问答-------------------- //datagridview 中绑定了数据源datatable以后,就不能直接对datagridview添加,删除行啦
所以只能对数据源下功夫,也就是先把数据添加到DataTable中然后在绑定一次
DataTable m_dt;
private void showinfo()
{
using (SqlDataAdapter da = new SqlDataAdapter("select * from student", con))
{
//这个方法里的DataTable 最好是用个全局变量保存起来,以备重复利用,不然就只有从数据库在查询一次啦
DataTable dt = new DataTable();
da.Fill(dt);
DataView dv = new DataView(dt);
m_dt = dt; //这里
this.dataGridView1.DataSource = dv;
}
}
//添加
DataRow dr = m_dt.newrow();
dr[0] = "111"; //textbox1.Text
dr[1] = "222"; //textbox1.Text
.....
m_dt.Rows.Add(dr);
this.dataGridView1.DataSource = m_dt; --------------------编程问答-------------------- 重新绑定一次数据表就可以了 --------------------编程问答--------------------
重新绑定数据 --------------------编程问答-------------------- 更新datagridview
DataSet ds = new DataSet();
SqlDataAdapter sda;
SqlCommandBuilder scb = new SqlCommandBuilder(sda);
sda.Update(ds);
this.dataGridView1.DataSource = ds.Tables[0];
--------------------编程问答-------------------- 好长的代码啊，还是标注一下哪里有问题 --------------------编程问答-------------------- 插入后重新绑定，或用SQLCOMMANDBUILD及SQLDATAADAPTER.UPDATE来做 --------------------编程问答-------------------- 把你的数据保存到数据库中，在显示在到表格上 --------------------编程问答-------------------- 呵呵...C#啊！正在刻苦钻研中！
补充：.NET技术 , C#
