VS学生管理系统的查找修改和删除应该怎么写
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;
using MyForm.DBLibrary;
using MyForm.Common;
namespace MyForm
{
public partial class frmStudent : Form
{
DBBase dbBase = new DBBase();
DataSet ds = new DataSet();
DataTable dt = new DataTable();
Utility utility;
public frmStudent()
{
InitializeComponent();
}
private void LoadStudent()
{
String sql = "select * from students";
dt = dbBase.ExecuteSQLGetDataTable( sql );
dgvStudent.DataSource = dt;
}
private void LoadDep()
{
String sqlText = "select * from Department";
dt = dbBase.ExecuteSQLGetDataTable(sqlText);
cmbSdept.DataSource = dt;
cmbSdept.DisplayMember = "Sdept";
//cmbDep.r
}
private void frmStudent_Load(object sender, EventArgs e)
{
LoadStudent();
LoadDep();
utility = new Utility(this);
utility.SetControlsEnable(false);
SetButtonStatus(false);
}
private void dgvStudent_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
DataGridViewRow row = dgvStudent.Rows[e.RowIndex];
String ID = row.Cells["colSno"].Value.ToString().Trim();
String name = row.Cells["colName"].Value.ToString().Trim();
if (e.ColumnIndex == row.Cells["coldetail"].ColumnIndex)
{
frmStudentDetail frm = new frmStudentDetail(name, ID);
frm.Owner = this;
frm.ShowDialog();
}
}
private void dgvStudent_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyData == Keys.Enter)
{
String ID = dgvStudent.Rows[dgvStudent.CurrentCellAddress.Y].Cells["colSno"].Value.ToString().Trim();
//String ID = row.Cells["colSno"].Value.ToString().Trim();dgvStudent.Rows[dgvStudent.CurrentCellAddress.Y].Cells["colName"].Value.ToString().Trim()
String name = dgvStudent.Rows[dgvStudent.CurrentCellAddress.Y].Cells["colName"].Value.ToString().Trim();
frmStudentDetail frm = new frmStudentDetail(name, ID);
frm.Owner = this;
frm.ShowDialog();
}
}
private void btnClose_Click(object sender, EventArgs e)
{
this.Close();
Dispose(true);
}
private void SetButtonStatus(bool flag)
{
btnAdd.Visible = !flag;
btnSave.Visible = flag;
btnCancel.Visible = flag;
}
private void btnAdd_Click(object sender, EventArgs e)
{
utility.SetControlsEnable(true);
SetButtonStatus(true);
utility.ClearContent();
}
private void btnSave_Click(object sender, EventArgs e)
{
if (!utility.CheckNull())
return;
//
String strSno = tbSno.Text.Trim();
String strName = tbSname.Text.Trim();
String strSex = cmbSsex.Text.Trim();
String strAge = tbSage.Text.Trim();
String strDept = cmbSdept.Text.Trim();
String sqlText = "insert into students(Sno,Sname,Ssex,Sage,Sdept) values('" + strSno + "','"
+ strName + "','"
+ strSex + "','"
+ strAge + "','"
+ strDept + "')";
bool tag = dbBase.ExecuteSQL(sqlText);
if (tag)
{
MessageBox.Show("插入成功！");
}
LoadStudent();
utility.SetControlsEnable(false);
SetButtonStatus(false);
utility.ClearContent();
dgvStudent.Rows[0].Selected = false;
foreach (DataGridViewRow row in dgvStudent.Rows)
{
if (row.Cells["colSno"].Value.ToString().Trim() == strSno)
{
row.Selected = true;
}
}
}
private void btnCancel_Click(object sender, EventArgs e)
{
SetButtonStatus(false);
utility.SetControlsEnable(false);
utility.ClearContent();
}
private void tbSage_Validating(object sender, CancelEventArgs e)
{
}
private void btselect_Click(object sender, EventArgs e)
{
}
private void btdelete_Click(object sender, EventArgs e)
{
}
}
} --------------------编程问答-------------------- 各位高手帮帮忙啊,真的不知道从哪里下手,没学过C#
或者提点点思路也可以.
先谢谢拉!
补充：.NET技术 , ASP.NET
