成绩.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>
	/// 成绩 的摘要说明。
	/// </summary>
	public class 成绩 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Panel panel1;
		private System.Windows.Forms.Panel panel2;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.TextBox textBox1;
		private System.Windows.Forms.TextBox textBox2;
		private System.Windows.Forms.Label label4;
		private System.Windows.Forms.Label label5;
		private System.Windows.Forms.TextBox textBox3;
		private System.Windows.Forms.Button button1;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public 成绩()
		{
			//
			// 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.panel1 = new System.Windows.Forms.Panel();
			this.panel2 = new System.Windows.Forms.Panel();
			this.label1 = new System.Windows.Forms.Label();
			this.label2 = new System.Windows.Forms.Label();
			this.label3 = new System.Windows.Forms.Label();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.textBox2 = new System.Windows.Forms.TextBox();
			this.label4 = new System.Windows.Forms.Label();
			this.label5 = new System.Windows.Forms.Label();
			this.textBox3 = new System.Windows.Forms.TextBox();
			this.button1 = new System.Windows.Forms.Button();
			this.panel1.SuspendLayout();
			this.panel2.SuspendLayout();
			this.SuspendLayout();
			// 
			// panel1
			// 
			this.panel1.Controls.AddRange(new System.Windows.Forms.Control[] {
																				 this.textBox2,
																				 this.textBox1,
																				 this.label3,
																				 this.label2,
																				 this.label1});
			this.panel1.Location = new System.Drawing.Point(16, 8);
			this.panel1.Name = "panel1";
			this.panel1.Size = new System.Drawing.Size(312, 120);
			this.panel1.TabIndex = 0;
			// 
			// panel2
			// 
			this.panel2.Controls.AddRange(new System.Windows.Forms.Control[] {
																				 this.button1,
																				 this.textBox3,
																				 this.label5,
																				 this.label4});
			this.panel2.Location = new System.Drawing.Point(16, 144);
			this.panel2.Name = "panel2";
			this.panel2.Size = new System.Drawing.Size(312, 96);
			this.panel2.TabIndex = 1;
			// 
			// label1
			// 
			this.label1.Font = new System.Drawing.Font("华文行楷", 18F, 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(16, 8);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(272, 32);
			this.label1.TabIndex = 0;
			this.label1.Text = "请输入学号和课程号";
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(24, 48);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(88, 16);
			this.label2.TabIndex = 1;
			this.label2.Text = "学号：";
			// 
			// label3
			// 
			this.label3.Location = new System.Drawing.Point(24, 88);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(88, 24);
			this.label3.TabIndex = 2;
			this.label3.Text = "课程号：";
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(136, 48);
			this.textBox1.Name = "textBox1";
			this.textBox1.Size = new System.Drawing.Size(128, 21);
			this.textBox1.TabIndex = 3;
			this.textBox1.Text = "";
			// 
			// textBox2
			// 
			this.textBox2.Location = new System.Drawing.Point(136, 88);
			this.textBox2.Name = "textBox2";
			this.textBox2.Size = new System.Drawing.Size(128, 21);
			this.textBox2.TabIndex = 4;
			this.textBox2.Text = "";
			// 
			// label4
			// 
			this.label4.Font = new System.Drawing.Font("华文行楷", 18F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label4.ForeColor = System.Drawing.Color.Red;
			this.label4.Location = new System.Drawing.Point(16, 8);
			this.label4.Name = "label4";
			this.label4.Size = new System.Drawing.Size(264, 32);
			this.label4.TabIndex = 0;
			this.label4.Text = "输出查询结果如下：";
			// 
			// label5
			// 
			this.label5.Location = new System.Drawing.Point(16, 56);
			this.label5.Name = "label5";
			this.label5.Size = new System.Drawing.Size(56, 24);
			this.label5.TabIndex = 1;
			this.label5.Text = "成绩：";
			// 
			// textBox3
			// 
			this.textBox3.Location = new System.Drawing.Point(80, 56);
			this.textBox3.Name = "textBox3";
			this.textBox3.Size = new System.Drawing.Size(96, 21);
			this.textBox3.TabIndex = 2;
			this.textBox3.Text = "";
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(208, 56);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(72, 24);
			this.button1.TabIndex = 3;
			this.button1.Text = "查询";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// 成绩
			// 
			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(344, 266);
			this.Controls.AddRange(new System.Windows.Forms.Control[] {
																		  this.panel2,
																		  this.panel1});
			this.Name = "成绩";
			this.Text = "成绩";
			this.panel1.ResumeLayout(false);
			this.panel2.ResumeLayout(false);
			this.ResumeLayout(false);

		}
		#endregion

		private void button1_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 xs_kc";
			SqlCommand cmd=new SqlCommand(sqlStr,cn);
			SqlDataReader dr=cmd.ExecuteReader();
			while(dr.Read())
			{				
				if(dr["sno"].ToString().Trim()==textBox1.Text&&dr["cno"].ToString().Trim()==textBox2.Text)
				{					
					textBox3.Text=dr["grade"].ToString();
					i=1;
				   			       
				}				
				
			}
			if(i==0)
			{
				MessageBox.Show("输入错误!");
			}			
			cn.Close();	
		}
	}
}