c#.net2005向sql添加、更新、删除数据的原代码(winform)
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;
namespace 学生成绩管理系统
{
public partial class studentluru : Form
{
// CurrencyManager cmAmend;
// SqlConnection sqlConnection1 = new SqlConnection();
public studentluru()
{
InitializeComponent();
}
private void studentluru_Load(object sender, EventArgs e)
{
}
//录入
private void button5_Click(object sender, EventArgs e)
{
string sno = textBox1.Text;
string sname = textBox2.Text;
string ssex = textBox3.Text;
string sage = textBox4.Text;
string sclass = textBox5.Text;
string sdept = textBox6.Text;
string saddress = textBox7.Text;
string sphone = textBox8.Text;
string sqq = textBox9.Text;
if (textBox1.Text == "" || textBox2.Text == "" || textBox5.Text == "")
{
if (textBox1.Text == "")
{
MessageBox.Show("学号不能为空", "警告提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);
textBox1.Focus();
return;
}
if (textBox2.Text == "")
{
MessageBox.Show("姓名不能为空", "警告提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);
textBox2.Focus();
return;
}
if (textBox5.Text == "")
{
MessageBox.Show("班级不能为空", "警告提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);
textBox5.Focus();
return;
}
}
else
{
string connstr = "server=IT32;uid=sa;pwd='sa';database=sc;";
try
{
SqlConnection conn = new SqlConnection(connstr);
conn.Open();
string sqlinsert = "insert into studentinfo values('" + sno + "','" + sname + "','" + ssex + "','" + sage + "','" + sclass + "','" + sdept + "','" + saddress + "','" + sphone + "','" + sqq + "')";
SqlCommand sc = new SqlCommand(sqlinsert, conn);
sc.ExecuteNonQuery();
textBox1.Text = "";
textBox2.Text = "";
textBox3.Text = "";
textBox4.Text = "";
textBox5.Text = "";
textBox6.Text = "";
textBox7.Text = "";
textBox8.Text = "";
textBox9.Text = "";
MessageBox.Show("数据已经添加成功", "温馨提示");
conn.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
}
private void button8_Click(object sender, EventArgs e)
{
this.Dispose();
}
}
}
这个是查询界面的代码:
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;
namespace 学生成绩管理系统
{
public partial class studentchaxun : Form
{
DataTable dt = new DataTable();
string per;
string sno;
CurrencyManager cmAmend;
public studentchaxun()
{
InitializeComponent();
}
public studentchaxun(string k, string s)
{
InitializeComponent();
per = k;
sno = s;
}
private void studentchaxun_Load(object sender, EventArgs e)
{
// TODO: 这行代码将数据加载到表“studentDataSet.studentinfo”中。您可以根据需要移动或移除它。
//this.studentinfoTableAdapter.Fill(this.studentDataSet.studentinfo);
//数据绑定
if (per == "超级用户")
{
string sqlsel = "select * from studentinfo ";
DataTable dt = bangding(sqlsel);
cmAmend = (CurrencyManager)BindingContext[dt];
this.dataGridView1.DataSource = dt;
this.comboBox1.DataSource = dt;
this.comboBox1.DisplayMember = "sno";
this.comboBox2.DataSource = dt;
this.comboBox2.DisplayMember = "sname";
}
if (per == "普通用户")
{
string sqlsel = "select * from studentinfo where sno='" + sno + "' ";
DataTable dt = bangding(sqlsel);
cmAmend = (CurrencyManager)BindingContext[dt];
this.dataGridView1.DataSource = dt;
this.comboBox1.DataSource = dt;
this.comboBox1.DisplayMember = "sno";
this.comboBox2.Enabled = false;
this.radioButton2.Enabled = false;
//this.toolStripButton1.Enabled = false;
//this.toolStripButton2.Enabled = false;
//this.toolStripButton3.Enabled = false;
//this.toolStripButton4.Enabled = false;
//this.comboBox2.DataSource = dt;
//this.comboBox2.DisplayMember = "sname";
}
}
DataTable bangding(string sqlsel)
{
string connstr = "server=.;uid=sa;pwd=sa;database=sc";
using (SqlConnection conn = new SqlConnection(connstr))
{
conn.Open();
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter(sqlsel, conn);
da.Fill(ds, "coust");
DataTable dt = ds.Tables["coust"];
conn.Close();
return dt;
}
}
private void button1_Click(object sender, EventArgs e)
{
if (this.radioButton1.Checked == true)
{
string xuehao = comboBox1.Text;
string sqlsel = "select * from studentinfo where sno='" + xuehao + "'";
this.dataGridView1.DataSource = bangding(sqlsel);
}
else
{
string xingming = comboBox2.Text;
string sqlsel = "select * from studentinfo where sname='" + xingming + "'";
this.dataGridView1.DataSource = bangding(sqlsel);
}
}
private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
if (this.radioButton1.Checked == true)
{
this.comboBox1.Enabled = true;
this.comboBox2.Enabled = false;
}
else
{
this.comboBox1.Enabled = false;
this.comboBox2.Enabled = true;
}
}
private void checkstate(int pos)
{
if (pos == 0)
{
toolStripButton1.Enabled = false;
toolStripButton2.Enabled = false;
toolStripButton3.Enabled = true;
toolStripButton4.Enabled = true;
}
else
{
toolStripButton1.Enabled = true;
toolStripButton2.Enabled = true;
toolStripButton3.Enabled = true;
toolStripButton4.Enabled = true;
}
}
//首记录
private void toolStripButton1_Click(object sender, EventArgs e)
{
cmAmend.Position = 0;//设置为0.回到首记录
this.dataGridView1.Select();
checkstate(cmAmend.Position);
}
//上一条
private void toolStripButton2_Click(object sender, EventArgs e)
{
cmAmend.Position--;
this.dataGridView1.Select();
checkstate(cmAmend.Position);
}
//下一条
private void toolStripButton3_Click(object sender, EventArgs e)
{
cmAmend.Position++;
this.dataGridView1.Select();
checkstate(cmAmend.Position);
}
//末记录
private void toolStripButton4_Click(object sender, EventArgs e)
{
cmAmend.Position = cmAmend.Count - 1;
this.dataGridView1.Select();
checkstate(cmAmend.Position);
}
}
}
删除的代码:
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;
namespace 学生成绩管理系统
{
public partial class studentshanchu : Form
{
CurrencyManager cmAmend;
public studentshanchu()
{
InitializeComponent();
}
private void studentshanchu_Load(object sender, EventArgs e)
{
// TODO: 这行代码将数据加载到表“studentDataSet.studentinfo”中。您可以根据需要移动或移除它。
//this.studentinfoTableAdapter.Fill(this.studentDataSet.studentinfo);
//数据绑定
string sqlsel = "select * from studentinfo ";
DataTable dt = bangding(sqlsel);
cmAmend = (CurrencyManager)BindingContext[dt];
this.dataGridView1.DataSource = dt;
this.textBox1.DataBindings.Add("text", dt, "sno");
this.textBox2.DataBindings.Add("text", dt, "sname");
this.textBox3.DataBindings.Add("text", dt, "ssex");
this.textBox4.DataBindings.Add("text", dt, "sage");
this.textBox5.DataBindings.Add("text", dt, "sclass");
this.textBox6.DataBindings.Add("text", dt, "sdept");
this.textBox7.DataBindings.Add("text", dt, "saddress");
this.textBox8.DataBindings.Add("text", dt, "sphone");
this.textBox9.DataBindings.Add("text", dt, "sqq");
}
DataTable bangding(string sqlsel)
{
string connstr = "server=.;uid=sa;pwd=sa;database=sc";
using (SqlConnection conn = new SqlConnection(connstr))
{
conn.Open();
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter(sqlsel, conn);
da.Fill(ds, "coust");
DataTable dt = ds.Tables["coust"];
conn.Close();
return dt;
}
}
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
if (checkBox1.Checked == true)
{ this.Height = 450; }
else
{ this.Height = 250; }
}
private void button1_Click(object sender, EventArgs e)
{
if (MessageBox.Show("你确定要删除该记录吗", "询问", MessageBoxButtons.OKCancel, MessageBoxIcon.Question) == DialogResult.OK)
{
int pos = this.dataGridView1.CurrentCell.RowIndex; //获取该行
string connstr = "server=.;uid=sa;pwd=sa;database=sc";
using (SqlConnection conn = new SqlConnection(connstr))
{
conn.Open();
DataSet ds = new DataSet();
string sqlset = "select * from studentinfo";
//数据集
SqlDataAdapter da = new SqlDataAdapter(sqlset, conn);
da.Fill(ds, "coust");
DataTable dt = ds.Tables["coust"];
SqlCommandBuilder cb = new SqlCommandBuilder(da);
dt.Rows[pos].Delete();
da.Update(ds, "coust");
textBox1.Text = "";
textBox2.Text = "";
textBox3.Text = "";
textBox4.Text = "";
textBox5.Text = "";
textBox6.Text = "";
textBox7.Text = "";
textBox8.Text = "";
textBox9.Text = "";
this.dataGridView1.DataSource = bangding(sqlset);
MessageBox.Show("恭喜你已成功删除","温馨提示");
conn.Close();
}
}
}
}
}
修改的代码:
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;
namespace 学生成绩管理系统
{
public partial class studentxiugai : Form
{
string connstr = "server=.;uid=sa;pwd=sa;database=sc";
string per;
string sno;
CurrencyManager cmAmend;
public studentxiugai()
{
InitializeComponent();
}
public studentxiugai(string k,string s)
{
InitializeComponent();
per = k;
sno = s;
}
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
if (checkBox1.Checked == true)
{ //this.Height = 450;
comboBox1.Enabled = false;
textBox1.Enabled = false;
}
else
{ //this.Height = 250;
comboBox1.Enabled = true;
textBox1.Enabled = true;
}
}
private void studentxiugai_Load(object sender, EventArgs e)
{
//数据绑定
if (per == "超级用户")
{
string sqlsel = "select * from studentinfo order by sno asc ";
DataTable dt = bangding(sqlsel);
cmAmend = (CurrencyManager)BindingContext[dt];
this.comboBox1.DataSource = dt;
this.comboBox1.DisplayMember = "sno";
this.textBox1.DataBindings.Add("text", dt, "sname");
this.textBox2.DataBindings.Add("text", dt, "ssex");
this.textBox3.DataBindings.Add("text", dt, "sage");
this.textBox4.DataBindings.Add("text", dt, "sclass");
this.textBox5.DataBindings.Add("text", dt, "sdept");
this.textBox6.DataBindings.Add("text", dt, "saddress");
this.textBox7.DataBindings.Add("text", dt, "sphone");
this.textBox8.DataBindings.Add("text", dt, "sqq");
}
if (per == "普通用户")
{
string sqlsel = "select *from studentinfo where sno='" + sno + "'";
DataTable dt = bangding(sqlsel);
this.comboBox1.DataSource = dt;
this.comboBox1.DisplayMember = "sno";
this.textBox1.DataBindings.Add("text", dt, "sname");
this.textBox2.DataBindings.Add("text", dt, "ssex");
this.textBox3.DataBindings.Add("text", dt, "sage");
this.textBox4.DataBindings.Add("text", dt, "sclass");
this.textBox5.DataBindings.Add("text", dt, "sdept");
this.textBox6.DataBindings.Add("text", dt, "saddress");
this.textBox7.DataBindings.Add("text", dt, "sphone");
this.textBox8.DataBindings.Add("text", dt, "sqq");
}
}
DataTable bangding(string sqlsel)
{
// string connstr = "server=.;uid=sa;pwd=sa;database=sc";
using (SqlConnection conn = new SqlConnection(connstr))
{
conn.Open();
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter(sqlsel, conn);
da.Fill(ds, "coust");
DataTable dt = ds.Tables["coust"];
conn.Close();
return dt;
}
}
private void button1_Click(object sender, EventArgs e)
{
if (checkBox1.Checked == true)
{
string sno = comboBox1.Text;
string sname = textBox1.Text;
string sex = textBox2.Text;
string age = textBox3.Text;
string sclass = textBox4.Text;
string sdept = textBox5.Text;
string saddress = textBox6.Text;
string sphone = textBox7.Text;
string sqq = textBox8.Text;
if (textBox2.Text == "" || textBox3.Text == "" || textBox4.Text == "" || textBox5.Text == "")
{
if (textBox2.Text == "")
{
MessageBox.Show("性别不能为空", "温馨提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);
textBox2.Focus();
return;
}
if (textBox3.Text == "")
{
MessageBox.Show("年龄不能为空", "温馨提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);
textBox3.Focus();
return;
}
if (textBox4.Text == "")
{
MessageBox.Show("班级不能为空", "温馨提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);
textBox4.Focus();
return;
}
if (textBox5.Text == "")
{
MessageBox.Show("系别不能为空", "温馨提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);
textBox5.Focus();
return;
}
}
else
{
string connstr = "server=IT32;uid=sa;pwd='sa';database=sc;";
try
{
SqlConnection conn = new SqlConnection(connstr);
conn.Open();
string sqlupdate = " update studentinfo set ssex='" + sex + "',sage='" + age + "',sclass='" + sclass + "',sdept='" + sdept + "',saddress='" + saddress + "',sphone='" + sphone + "',sqq='" + sqq + "' where sno='" + sno + "'";
SqlCommand sc = new SqlCommand(sqlupdate, conn);
sc.ExecuteNonQuery();
MessageBox.Show("数据已经修改成功", "温馨提示");
conn.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
}
else
{
MessageBox.Show("对不起,你还没有选中'我要修改',所以您无法修改","温馨提示");
}
}
}
}
更新的代码,只需要重新在数据库里面查询一次并把它取出来就行了.
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace 学生成绩管理系统
{
public partial class studentluru : Form
{
// CurrencyManager cmAmend;
// SqlConnection sqlConnection1 = new SqlConnection();
public studentluru()
{
InitializeComponent();
}
private void studentluru_Load(object sender, EventArgs e)
{
}
//录入
private void button5_Click(object sender, EventArgs e)
{
string sno = textBox1.Text;
string sname = textBox2.Text;
string ssex = textBox3.Text;
string sage = textBox4.Text;
string sclass = textBox5.Text;
string sdept = textBox6.Text;
string saddress = textBox7.Text;
string sphone = textBox8.Text;
string sqq = textBox9.Text;
if (textBox1.Text == "" || textBox2.Text == "" || textBox5.Text == "")
{
if (textBox1.Text == "")
{
MessageBox.Show("学号不能为空", "警告提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);
textBox1.Focus();
return;
}
if (textBox2.Text == "")
{
MessageBox.Show("姓名不能为空", "警告提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);
textBox2.Focus();
return;
}
if (textBox5.Text == "")
{
MessageBox.Show("班级不能为空", "警告提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);
textBox5.Focus();
return;
}
}
else
{
string connstr = "server=IT32;uid=sa;pwd='sa';database=sc;";
try
{
SqlConnection conn = new SqlConnection(connstr);
conn.Open();
string sqlinsert = "insert into studentinfo values('" + sno + "','" + sname + "','" + ssex + "','" + sage + "','" + sclass + "','" + sdept + "','" + saddress + "','" + sphone + "','" + sqq + "')";
SqlCommand sc = new SqlCommand(sqlinsert, conn);
sc.ExecuteNonQuery();
textBox1.Text = "";
textBox2.Text = "";
textBox3.Text = "";
textBox4.Text = "";
textBox5.Text = "";
textBox6.Text = "";
textBox7.Text = "";
textBox8.Text = "";
textBox9.Text = "";
MessageBox.Show("数据已经添加成功", "温馨提示");
conn.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
}
private void button8_Click(object sender, EventArgs e)
{
this.Dispose();
}
}
}
这个是查询界面的代码:
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;
namespace 学生成绩管理系统
{
public partial class studentchaxun : Form
{
DataTable dt = new DataTable();
string per;
string sno;
CurrencyManager cmAmend;
public studentchaxun()
{
InitializeComponent();
}
public studentchaxun(string k, string s)
{
InitializeComponent();
per = k;
sno = s;
}
private void studentchaxun_Load(object sender, EventArgs e)
{
// TODO: 这行代码将数据加载到表“studentDataSet.studentinfo”中。您可以根据需要移动或移除它。
//this.studentinfoTableAdapter.Fill(this.studentDataSet.studentinfo);
//数据绑定
if (per == "超级用户")
{
string sqlsel = "select * from studentinfo ";
DataTable dt = bangding(sqlsel);
cmAmend = (CurrencyManager)BindingContext[dt];
this.dataGridView1.DataSource = dt;
this.comboBox1.DataSource = dt;
this.comboBox1.DisplayMember = "sno";
this.comboBox2.DataSource = dt;
this.comboBox2.DisplayMember = "sname";
}
if (per == "普通用户")
{
string sqlsel = "select * from studentinfo where sno='" + sno + "' ";
DataTable dt = bangding(sqlsel);
cmAmend = (CurrencyManager)BindingContext[dt];
this.dataGridView1.DataSource = dt;
this.comboBox1.DataSource = dt;
this.comboBox1.DisplayMember = "sno";
this.comboBox2.Enabled = false;
this.radioButton2.Enabled = false;
//this.toolStripButton1.Enabled = false;
//this.toolStripButton2.Enabled = false;
//this.toolStripButton3.Enabled = false;
//this.toolStripButton4.Enabled = false;
//this.comboBox2.DataSource = dt;
//this.comboBox2.DisplayMember = "sname";
}
}
DataTable bangding(string sqlsel)
{
string connstr = "server=.;uid=sa;pwd=sa;database=sc";
using (SqlConnection conn = new SqlConnection(connstr))
{
conn.Open();
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter(sqlsel, conn);
da.Fill(ds, "coust");
DataTable dt = ds.Tables["coust"];
conn.Close();
return dt;
}
}
private void button1_Click(object sender, EventArgs e)
{
if (this.radioButton1.Checked == true)
{
string xuehao = comboBox1.Text;
string sqlsel = "select * from studentinfo where sno='" + xuehao + "'";
this.dataGridView1.DataSource = bangding(sqlsel);
}
else
{
string xingming = comboBox2.Text;
string sqlsel = "select * from studentinfo where sname='" + xingming + "'";
this.dataGridView1.DataSource = bangding(sqlsel);
}
}
private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
if (this.radioButton1.Checked == true)
{
this.comboBox1.Enabled = true;
this.comboBox2.Enabled = false;
}
else
{
this.comboBox1.Enabled = false;
this.comboBox2.Enabled = true;
}
}
private void checkstate(int pos)
{
if (pos == 0)
{
toolStripButton1.Enabled = false;
toolStripButton2.Enabled = false;
toolStripButton3.Enabled = true;
toolStripButton4.Enabled = true;
}
else
{
toolStripButton1.Enabled = true;
toolStripButton2.Enabled = true;
toolStripButton3.Enabled = true;
toolStripButton4.Enabled = true;
}
}
//首记录
private void toolStripButton1_Click(object sender, EventArgs e)
{
cmAmend.Position = 0;//设置为0.回到首记录
this.dataGridView1.Select();
checkstate(cmAmend.Position);
}
//上一条
private void toolStripButton2_Click(object sender, EventArgs e)
{
cmAmend.Position--;
this.dataGridView1.Select();
checkstate(cmAmend.Position);
}
//下一条
private void toolStripButton3_Click(object sender, EventArgs e)
{
cmAmend.Position++;
this.dataGridView1.Select();
checkstate(cmAmend.Position);
}
//末记录
private void toolStripButton4_Click(object sender, EventArgs e)
{
cmAmend.Position = cmAmend.Count - 1;
this.dataGridView1.Select();
checkstate(cmAmend.Position);
}
}
}
删除的代码:
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;
namespace 学生成绩管理系统
{
public partial class studentshanchu : Form
{
CurrencyManager cmAmend;
public studentshanchu()
{
InitializeComponent();
}
private void studentshanchu_Load(object sender, EventArgs e)
{
// TODO: 这行代码将数据加载到表“studentDataSet.studentinfo”中。您可以根据需要移动或移除它。
//this.studentinfoTableAdapter.Fill(this.studentDataSet.studentinfo);
//数据绑定
string sqlsel = "select * from studentinfo ";
DataTable dt = bangding(sqlsel);
cmAmend = (CurrencyManager)BindingContext[dt];
this.dataGridView1.DataSource = dt;
this.textBox1.DataBindings.Add("text", dt, "sno");
this.textBox2.DataBindings.Add("text", dt, "sname");
this.textBox3.DataBindings.Add("text", dt, "ssex");
this.textBox4.DataBindings.Add("text", dt, "sage");
this.textBox5.DataBindings.Add("text", dt, "sclass");
this.textBox6.DataBindings.Add("text", dt, "sdept");
this.textBox7.DataBindings.Add("text", dt, "saddress");
this.textBox8.DataBindings.Add("text", dt, "sphone");
this.textBox9.DataBindings.Add("text", dt, "sqq");
}
DataTable bangding(string sqlsel)
{
string connstr = "server=.;uid=sa;pwd=sa;database=sc";
using (SqlConnection conn = new SqlConnection(connstr))
{
conn.Open();
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter(sqlsel, conn);
da.Fill(ds, "coust");
DataTable dt = ds.Tables["coust"];
conn.Close();
return dt;
}
}
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
if (checkBox1.Checked == true)
{ this.Height = 450; }
else
{ this.Height = 250; }
}
private void button1_Click(object sender, EventArgs e)
{
if (MessageBox.Show("你确定要删除该记录吗", "询问", MessageBoxButtons.OKCancel, MessageBoxIcon.Question) == DialogResult.OK)
{
int pos = this.dataGridView1.CurrentCell.RowIndex; //获取该行
string connstr = "server=.;uid=sa;pwd=sa;database=sc";
using (SqlConnection conn = new SqlConnection(connstr))
{
conn.Open();
DataSet ds = new DataSet();
string sqlset = "select * from studentinfo";
//数据集
SqlDataAdapter da = new SqlDataAdapter(sqlset, conn);
da.Fill(ds, "coust");
DataTable dt = ds.Tables["coust"];
SqlCommandBuilder cb = new SqlCommandBuilder(da);
dt.Rows[pos].Delete();
da.Update(ds, "coust");
textBox1.Text = "";
textBox2.Text = "";
textBox3.Text = "";
textBox4.Text = "";
textBox5.Text = "";
textBox6.Text = "";
textBox7.Text = "";
textBox8.Text = "";
textBox9.Text = "";
this.dataGridView1.DataSource = bangding(sqlset);
MessageBox.Show("恭喜你已成功删除","温馨提示");
conn.Close();
}
}
}
}
}
修改的代码:
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;
namespace 学生成绩管理系统
{
public partial class studentxiugai : Form
{
string connstr = "server=.;uid=sa;pwd=sa;database=sc";
string per;
string sno;
CurrencyManager cmAmend;
public studentxiugai()
{
InitializeComponent();
}
public studentxiugai(string k,string s)
{
InitializeComponent();
per = k;
sno = s;
}
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
if (checkBox1.Checked == true)
{ //this.Height = 450;
comboBox1.Enabled = false;
textBox1.Enabled = false;
}
else
{ //this.Height = 250;
comboBox1.Enabled = true;
textBox1.Enabled = true;
}
}
private void studentxiugai_Load(object sender, EventArgs e)
{
//数据绑定
if (per == "超级用户")
{
string sqlsel = "select * from studentinfo order by sno asc ";
DataTable dt = bangding(sqlsel);
cmAmend = (CurrencyManager)BindingContext[dt];
this.comboBox1.DataSource = dt;
this.comboBox1.DisplayMember = "sno";
this.textBox1.DataBindings.Add("text", dt, "sname");
this.textBox2.DataBindings.Add("text", dt, "ssex");
this.textBox3.DataBindings.Add("text", dt, "sage");
this.textBox4.DataBindings.Add("text", dt, "sclass");
this.textBox5.DataBindings.Add("text", dt, "sdept");
this.textBox6.DataBindings.Add("text", dt, "saddress");
this.textBox7.DataBindings.Add("text", dt, "sphone");
this.textBox8.DataBindings.Add("text", dt, "sqq");
}
if (per == "普通用户")
{
string sqlsel = "select *from studentinfo where sno='" + sno + "'";
DataTable dt = bangding(sqlsel);
this.comboBox1.DataSource = dt;
this.comboBox1.DisplayMember = "sno";
this.textBox1.DataBindings.Add("text", dt, "sname");
this.textBox2.DataBindings.Add("text", dt, "ssex");
this.textBox3.DataBindings.Add("text", dt, "sage");
this.textBox4.DataBindings.Add("text", dt, "sclass");
this.textBox5.DataBindings.Add("text", dt, "sdept");
this.textBox6.DataBindings.Add("text", dt, "saddress");
this.textBox7.DataBindings.Add("text", dt, "sphone");
this.textBox8.DataBindings.Add("text", dt, "sqq");
}
}
DataTable bangding(string sqlsel)
{
// string connstr = "server=.;uid=sa;pwd=sa;database=sc";
using (SqlConnection conn = new SqlConnection(connstr))
{
conn.Open();
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter(sqlsel, conn);
da.Fill(ds, "coust");
DataTable dt = ds.Tables["coust"];
conn.Close();
return dt;
}
}
private void button1_Click(object sender, EventArgs e)
{
if (checkBox1.Checked == true)
{
string sno = comboBox1.Text;
string sname = textBox1.Text;
string sex = textBox2.Text;
string age = textBox3.Text;
string sclass = textBox4.Text;
string sdept = textBox5.Text;
string saddress = textBox6.Text;
string sphone = textBox7.Text;
string sqq = textBox8.Text;
if (textBox2.Text == "" || textBox3.Text == "" || textBox4.Text == "" || textBox5.Text == "")
{
if (textBox2.Text == "")
{
MessageBox.Show("性别不能为空", "温馨提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);
textBox2.Focus();
return;
}
if (textBox3.Text == "")
{
MessageBox.Show("年龄不能为空", "温馨提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);
textBox3.Focus();
return;
}
if (textBox4.Text == "")
{
MessageBox.Show("班级不能为空", "温馨提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);
textBox4.Focus();
return;
}
if (textBox5.Text == "")
{
MessageBox.Show("系别不能为空", "温馨提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);
textBox5.Focus();
return;
}
}
else
{
string connstr = "server=IT32;uid=sa;pwd='sa';database=sc;";
try
{
SqlConnection conn = new SqlConnection(connstr);
conn.Open();
string sqlupdate = " update studentinfo set ssex='" + sex + "',sage='" + age + "',sclass='" + sclass + "',sdept='" + sdept + "',saddress='" + saddress + "',sphone='" + sphone + "',sqq='" + sqq + "' where sno='" + sno + "'";
SqlCommand sc = new SqlCommand(sqlupdate, conn);
sc.ExecuteNonQuery();
MessageBox.Show("数据已经修改成功", "温馨提示");
conn.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
}
else
{
MessageBox.Show("对不起,你还没有选中'我要修改',所以您无法修改","温馨提示");
}
}
}
}
更新的代码,只需要重新在数据库里面查询一次并把它取出来就行了.
