系统维护.cs

用c#编写的一个学生信息管理系统

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
namespace student
{
	/// <summary>
	/// 系统维护 的摘要说明。
	/// </summary>
	public class 系统维护 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.GroupBox groupBox1;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.TextBox textBox1;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.TextBox textBox2;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Button button2;
		private System.Windows.Forms.Button button3;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public 系统维护()
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent();

			//
			// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
			//
		}

		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if(components != null)
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{
			this.label1 = new System.Windows.Forms.Label();
			this.groupBox1 = new System.Windows.Forms.GroupBox();
			this.label2 = new System.Windows.Forms.Label();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.label3 = new System.Windows.Forms.Label();
			this.textBox2 = new System.Windows.Forms.TextBox();
			this.button1 = new System.Windows.Forms.Button();
			this.button2 = new System.Windows.Forms.Button();
			this.button3 = new System.Windows.Forms.Button();
			this.groupBox1.SuspendLayout();
			this.SuspendLayout();
			// 
			// label1
			// 
			this.label1.Font = new System.Drawing.Font("华文行楷", 21.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label1.ForeColor = System.Drawing.Color.Red;
			this.label1.Location = new System.Drawing.Point(40, 16);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(328, 32);
			this.label1.TabIndex = 0;
			this.label1.Text = "请在下面输入相关信息";
			// 
			// groupBox1
			// 
			this.groupBox1.Controls.AddRange(new System.Windows.Forms.Control[] {
																					this.button3,
																					this.button2,
																					this.button1,
																					this.textBox2,
																					this.label3,
																					this.textBox1,
																					this.label2});
			this.groupBox1.Location = new System.Drawing.Point(8, 56);
			this.groupBox1.Name = "groupBox1";
			this.groupBox1.Size = new System.Drawing.Size(384, 216);
			this.groupBox1.TabIndex = 1;
			this.groupBox1.TabStop = false;
			this.groupBox1.Text = "用户信息";
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(40, 24);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(96, 32);
			this.label2.TabIndex = 0;
			this.label2.Text = "用户名：";
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(184, 24);
			this.textBox1.Name = "textBox1";
			this.textBox1.Size = new System.Drawing.Size(152, 21);
			this.textBox1.TabIndex = 1;
			this.textBox1.Text = "";
			// 
			// label3
			// 
			this.label3.Location = new System.Drawing.Point(40, 64);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(104, 32);
			this.label3.TabIndex = 2;
			this.label3.Text = "密码：";
			// 
			// textBox2
			// 
			this.textBox2.Location = new System.Drawing.Point(184, 64);
			this.textBox2.Name = "textBox2";
			this.textBox2.PasswordChar = '＊';
			this.textBox2.Size = new System.Drawing.Size(152, 21);
			this.textBox2.TabIndex = 3;
			this.textBox2.Text = "";
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(48, 128);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(80, 24);
			this.button1.TabIndex = 4;
			this.button1.Text = "添加";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// button2
			// 
			this.button2.Location = new System.Drawing.Point(152, 128);
			this.button2.Name = "button2";
			this.button2.Size = new System.Drawing.Size(80, 24);
			this.button2.TabIndex = 5;
			this.button2.Text = "修改";
			this.button2.Click += new System.EventHandler(this.button2_Click);
			// 
			// button3
			// 
			this.button3.Location = new System.Drawing.Point(264, 128);
			this.button3.Name = "button3";
			this.button3.Size = new System.Drawing.Size(80, 24);
			this.button3.TabIndex = 6;
			this.button3.Text = "删除";
			this.button3.Click += new System.EventHandler(this.button3_Click);
			// 
			// 系统维护
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.BackColor = System.Drawing.Color.FromArgb(((System.Byte)(128)), ((System.Byte)(128)), ((System.Byte)(255)));
			this.ClientSize = new System.Drawing.Size(408, 290);
			this.Controls.AddRange(new System.Windows.Forms.Control[] {
																		  this.groupBox1,
																		  this.label1});
			this.Name = "系统维护";
			this.Text = "系统维护";
			this.groupBox1.ResumeLayout(false);
			this.ResumeLayout(false);

		}
		#endregion

		private void button1_Click(object sender, System.EventArgs e)
		{
			try
			{
				string hostname=System.Net.Dns.GetHostName(); 
				string cnStr="Integrated Security=SSPI;Persist Security Info=False;password=;" 
					+"Initial Catalog=学生信息管理系统;Data Source='"+hostname+"'";
				SqlConnection cn=new SqlConnection(cnStr);
				cn.Open();

				string sqlStr="select * from denglu";
				SqlCommand cmd=new SqlCommand(sqlStr,cn);
						

				SqlDataAdapter myDataAdapter=new SqlDataAdapter();
				myDataAdapter.SelectCommand=cmd;

				SqlCommandBuilder custCB=new SqlCommandBuilder(myDataAdapter);

				DataSet ds=new DataSet();
				myDataAdapter.Fill(ds);			
				DataRow myDataRow=ds.Tables[0].NewRow();
			
				myDataRow["name"]=textBox1.Text;
				myDataRow["password"]=textBox2.Text;
			
				ds.Tables[0].Rows.Add(myDataRow);		
					

				myDataAdapter.Update(ds);			
				cn.Close();
				MessageBox.Show("成功录入！");
			}
			catch(SqlException)
			{
				MessageBox.Show("输入错误！");
			}
		}

		private void button2_Click(object sender, System.EventArgs e)
		{
			try
			{
				int i=0;
				string hostname=System.Net.Dns.GetHostName();
				string cnStr="Integrated Security=SSPI;Persist Security Info=False;password=;" 
					+"Initial Catalog=学生信息管理系统;Data Source='"+hostname+"'";
				SqlConnection cn=new SqlConnection(cnStr);
				cn.Open();
				string sqlStr="select * from denglu";
				SqlCommand cmd=new SqlCommand(sqlStr,cn);
				SqlDataAdapter myDataAdapter=new SqlDataAdapter();
				myDataAdapter.SelectCommand=cmd;					

				DataSet ds=new DataSet();
				myDataAdapter.Fill(ds);		
				SqlCommandBuilder custCB=new SqlCommandBuilder(myDataAdapter);
				DataRow myDataRow=ds.Tables[0].NewRow();
				foreach(DataRow dr in ds.Tables[0].Rows)
				{
					if(dr["name"].ToString().Trim()==textBox1.Text)
					{
						dr["password"]=textBox2.Text;
						dr["name"]=textBox1.Text;													
						myDataAdapter.Update(ds);
						MessageBox.Show("更改成功!");
						i=1;
						break;
					}
				}			
			
				if(i==0)
				{
					MessageBox.Show("输入错误!");
				}					
				cn.Close();
			}
			catch(SqlException)
			{
				MessageBox.Show("输入错误！");
			}
		}

		private void button3_Click(object sender, System.EventArgs e)
		{
			int i=0;
			string hostname=System.Net.Dns.GetHostName();
			string cnStr="Integrated Security=SSPI;Persist Security Info=False;password=;" 
				+"Initial Catalog=学生信息管理系统;Data Source='"+hostname+"'";
			SqlConnection cn=new SqlConnection(cnStr);
			cn.Open();
			string sqlStr="select * from denglu";
			SqlCommand cmd=new SqlCommand(sqlStr,cn);
			SqlDataAdapter myDataAdapter=new SqlDataAdapter();
			myDataAdapter.SelectCommand=cmd;					

			DataSet ds=new DataSet();
			myDataAdapter.Fill(ds);		
			SqlCommandBuilder custCB=new SqlCommandBuilder(myDataAdapter);
			DataRow myDataRow=ds.Tables[0].NewRow();
			foreach(DataRow dr in ds.Tables[0].Rows)
			{
				if(dr["name"].ToString().Trim()==textBox1.Text&&dr["password"].ToString().Trim()==textBox2.Text)
				{
					dr.Delete();								
					myDataAdapter.Update(ds);
					MessageBox.Show("删除成功!");
					i=1;
					break;
				}
			}			
			
			if(i==0)
			{
				MessageBox.Show("输入错误!");
			}					
			cn.Close();	
		}
	}
}