C#与SQL server 的连接
数据库的服务器管理员信息表
学生信息表
一、登陆窗口
源代码：
源代码：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient; //此处的应用是必要的
namespace 数据库
{
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
SqlConnection thisConn = new SqlConnection("Server=szpt-ceacc3d660\\SQLEXPRESS;Integrated Security=true;Database=数据库"); //创建与数据库的连接
SqlDataAdapter thisAdapter = new SqlDataAdapter("select * from 学生信息", thisConn); //创建SQL适配器
SqlCommandBuilder thisBuilder = new SqlCommandBuilder(thisAdapter); //创建SQL命令生成器
DataSet thisDataSet = new DataSet(); //创建数据集
thisAdapter.Fill(thisDataSet, "Student"); //将查询结果填充到数据集中
listBox1.Items.Clear();
listBox1.Items.Add(" 学号姓名性别年龄成绩");
foreach(DataRow row in thisDataSet.Tables["Student"].Rows)
{
listBox1.Items.Add(row["学号"].ToString() + "" + row["姓名"].ToString() + "" + row["性别"].ToString() + " " + row["年龄"].ToString() + " " + row["成绩"].ToString());
}
}
private void button2_Click(object sender, EventArgs e)
{
SqlConnection thisConn = new SqlConnection("Server=szpt-ceacc3d660\\SQLEXPRESS;Integrated Security=true;Database=数据库"); //创建与数据库的连接
SqlDataAdapter thisAdapter = new SqlDataAdapter("select * from 学生信息", thisConn); //创建SQL适配器
SqlCommandBuilder thisBuilder = new SqlCommandBuilder(thisAdapter); //创建SQL命令生成器
DataSet thisDataSet = new DataSet(); //创建数据集
thisAdapter.Fill(thisDataSet, "Student"); //将查询结果填充到数据集中
DataRow newRow = thisDataSet.Tables["Student"].NewRow();//创建新行
newRow["学号"] = textBox1.Text.ToString();
newRow["姓名"] = textBox2.Text.ToString();
newRow["性别"] = textBox3.Text.ToString();
newRow["年龄"] = textBox4.Text.ToString();
newRow["成绩"] = textBox5.Text.ToString();
thisDataSet.Tables["Student"].Rows.Add(newRow); //增加到数据集里
thisAdapter.Update(thisDataSet,"Student"); //写到数据库中
MessageBox.Show("插入数据成功！");
listBox2.Items.Clear();
listBox2.Items.Add(" 学号姓名性别年龄成绩");
foreach(DataRow row in thisDataSet.Tables["Student"].Rows)
{
listBox2.Items.Add(row["学号"].ToString() + "" + row["姓名"].ToString() + "" + row["性别"].ToString() + " " + row["年龄"].ToString() + " " + row["成绩"].ToString());
}
textBox1.Text = "";
textBox2.Text = "";
textBox3.Text = "";
textBox4.Text = "";
textBox5.Text = "";
}
private void button3_Click(object sender, EventArgs e)
{
SqlConnection thisConn = new SqlConnection("Server=szpt-ceacc3d660\\SQLEXPRESS;Integrated Security=true;Database=数据库"); //创建与数据库的连接
SqlDataAdapter thisAdapter = new SqlDataAdapter("select * from 学生信息", thisConn); //创建SQL适配器
SqlCommandBuilder thisBuilder = new SqlCommandBuilder(thisAdapter);//创建SQL命令生成器
DataSet thisDataSet = new DataSet(); //创建数据集
thisAdapter.Fill(thisDataSet, "Student"); //将查询结果填充到数据集中
thisDataSet.Tables["Student"].Rows.Delete();
thisAdapter.Update(thisDataSet, "Student");
listBox3.Items.Clear();
listBox3.Items.Add(" 学号姓名性别年龄成绩");
foreach (DataRow row in thisDataSet.Tables["Student"].Rows)
{
listBox3.Items.Add(row["学号"].ToString() + "" + row["姓名"].ToString() + "" + row["性别"].ToString() + " " + row["年龄"].ToString() + " " + row["成绩"].ToString());
}
textBox6.Text = "";
}
private void button4_Click(object sender, EventArgs e)
{
SqlConnection thisConn = new SqlConnection("Server=szpt-ceacc3d660\\SQLEXPRESS;Integrated Security=true;Database=数据库"); //创建与数据库的连接
SqlDataAdapter thisAdapter = new SqlDataAdapter("select * from 学生信息", thisConn); //创建SQL适配器
SqlCommandBuilder thisBuilder = new SqlCommandBuilder(thisAdapter);//创建SQL命令生成器
DataSet thisDataSet = new DataSet(); //创建数据集
thisAdapter.Fill(thisDataSet, "Student"); //将查询结果填充到数据集中
thisDataSet.Tables["Student"].Rows["成绩"] = textBox8.Text;
thisAdapter.Update(thisDataSet, "Student");
listBox4.Items.Clear();
listBox4.Items.Add(" 学号姓名性别年龄成绩");
foreach (DataRow row in thisDataSet.Tables["Student"].Rows)
{
listBox4.Items.Add(row["学号"].ToString() + "" + row["姓名"].ToString() + "" + row["性别"].ToString() + " " + row["年龄"].ToString() + " " + row["成绩"].ToString());
}
textBox7.Text = "";
textBox8.Text = "";
}
private void button5_Click(object sender, EventArgs e)
{
string command1 ="select * from 学生信息 where 性别='男'";
SqlConnection thisConn = new SqlConnection("Server=szpt-ceacc3d660\\SQLEXPRESS;Integrated Security=true;Database=数据库"); //创建与数据库的连接
SqlDataAdapter thisAdapter = new SqlDataAdapter(command1, thisConn); //创建SQL适配器
SqlCommandBuilder thisBuilder = new SqlCommandBuilder(thisAdapter);//创建SQL命令生成器
DataSet thisDataSet = new DataSet(); //创建数据集
thisAdapter.Fill(thisDataSet, "Student"); //将查询结果填充到数据集中
listBox5.Items.Clear();
listBox5.Items.Add(" 学号姓名性别年龄成绩");
foreach (DataRow row in thisDataSet.Tables["Student"].Rows)
{
listBox5.Items.Add(row["学号"].ToString() + "" + row["姓名"].ToString() + "" + row["性别"].ToString() + " " + row["年龄"].ToString() + " " + row["成绩"].ToString());
}
}
private void button6_Click(object sender, EventArgs e)
{
int i = 60;
string command2 = "select * from 学生信息 where 成绩<"+i;
SqlConnection thisConn = new SqlConnection("Server=szpt-ceacc3d660\\SQLEXPRESS;Integrated Security=true;Database=数据库"); //创建与数据库的连接
SqlDataAdapter thisAdapter = new SqlDataAdapter(command2, thisConn); //创建SQL适配器
SqlCommandBuilder thisBuilder = new SqlCommandBuilder(thisAdapter);//创建SQL命令生成器
DataSet thisDataSet = new DataSet(); //创建数据集
thisAdapter.Fill(thisDataSet, "Student"); //将查询结果填充到数据集中
listBox5.Items.Clear();
listBox5.Items.Add(" 学号姓名性别年龄成绩");
foreach (DataRow row in thisDataSet.Tables["Student"].Rows)
{
listBox5.Items.Add(row["学号"].ToString() + "" + row["姓名"].ToString() + "" + row["性别"].ToString() + " " + row["年龄"].ToString() + " " + row["成绩"].ToString());
}
}
private void button7_Click(object sender, EventArgs e)
{
int age=17;
string command3 = "select * from 学生信息 where 年龄>"+age+"and 性别='男'";
SqlConnection thisConn = new SqlConnection("Server=szpt-ceacc3d660\\SQLEXPRESS;Integrated Security=true;Database=数据库"); //创建与数据库的连接
SqlDataAdapter thisAdapter = new SqlDataAdapter(command3, thisConn); //创建SQL适配器
SqlCommandBuilder thisBuilder = new SqlCommandBuilder(thisAdapter);//创建SQL命令生成器
DataSet thisDataSet = new DataSet(); //创建数据集
thisAdapter.Fill(thisDataSet, "Student"); //将查询结果填充到数据集中
listBox5.Items.Clear();
listBox5.Items.Add(" 学号姓名性别年龄成绩");
foreach (DataRow row in thisDataSet.Tables["Student"].Rows)
{
listBox5.Items.Add(row["学号"].ToString() + "" + row["姓名"].ToString() + "" + row["性别"].ToString() + " " + row["年龄"].ToString() + " " + row["成绩"].ToString());
}
}
private void button8_Click(object sender, EventArgs e)
{
string command4 = "select * from 学生信息 where 性别='女'";
SqlConnection thisConn = new SqlConnection("Server=szpt-ceacc3d660\\SQLEXPRESS;Integrated Security=true;Database=数据库"); //创建与数据库的连接
SqlDataAdapter thisAdapter = new SqlDataAdapter(command4, thisConn); //创建SQL适配器
SqlCommandBuilder thisBuilder = new SqlCommandBuilder(thisAdapter);//创建SQL命令生成器
DataSet thisDataSet = new DataSet(); //创建数据集
thisAdapter.Fill(thisDataSet, "Student"); //将查询结果填充到数据集中
listBox5.Items.Clear();
listBox5.Items.Add(" 学号姓名性别年龄成绩");
foreach (DataRow row in thisDataSet.Tables["Student"].Rows)
{
listBox5.Items.Add(row["学号"].ToString() + "" + row["姓名"].ToString() + "" + row["性别"].ToString() + " " + row["年龄"].ToString() + " " + row["成绩"].ToString());
}
}
}
}
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