modifyscore.cs

C#编写的学籍管理系统

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data.OleDb;

namespace WindowsApplication1
{
	/// <summary>
	/// ModifyScore 的摘要说明。
	/// </summary>
	public class ModifyScore : System.Windows.Forms.Form
	{
		public System.Windows.Forms.Label label1;
		public System.Windows.Forms.TextBox textBox1;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Button button2;
		private System.Windows.Forms.Label label2;
		private System.Data.OleDb.OleDbConnection oleDbConnection1;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public ModifyScore()
		{
			//
			// 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 窗体设计器生成的代码
		/// <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.textBox1 = new System.Windows.Forms.TextBox();
			this.button1 = new System.Windows.Forms.Button();
			this.button2 = new System.Windows.Forms.Button();
			this.label2 = new System.Windows.Forms.Label();
			this.oleDbConnection1 = new System.Data.OleDb.OleDbConnection();
			this.SuspendLayout();
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(21, 21);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(214, 29);
			this.label1.TabIndex = 0;
			this.label1.Text = "课程";
			this.label1.TextAlign = System.Drawing.ContentAlignment.TopCenter;
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(117, 62);
			this.textBox1.Name = "textBox1";
			this.textBox1.Size = new System.Drawing.Size(118, 25);
			this.textBox1.TabIndex = 1;
			this.textBox1.Text = "";
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(32, 113);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(85, 30);
			this.button1.TabIndex = 2;
			this.button1.Text = "修改";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// button2
			// 
			this.button2.Location = new System.Drawing.Point(149, 113);
			this.button2.Name = "button2";
			this.button2.Size = new System.Drawing.Size(86, 30);
			this.button2.TabIndex = 3;
			this.button2.Text = "退出";
			this.button2.Click += new System.EventHandler(this.button2_Click);
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(32, 64);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(53, 21);
			this.label2.TabIndex = 4;
			this.label2.Text = "分数:";
			// 
			// oleDbConnection1
			// 
			this.oleDbConnection1.ConnectionString = "Data Source=xsxxdb.mdb;Jet OLEDB:Engine Type=5;Provider=Microsoft.Jet." +
				"OLEDB.4.0;";
			// 
			// ModifyScore
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(8, 18);
			this.ClientSize = new System.Drawing.Size(258, 152);
			this.Controls.Add(this.label2);
			this.Controls.Add(this.button2);
			this.Controls.Add(this.button1);
			this.Controls.Add(this.textBox1);
			this.Controls.Add(this.label1);
			this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
			this.Name = "ModifyScore";
			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
			this.Text = "成绩修改";
			this.ResumeLayout(false);

		}
		#endregion
		public int strisnumber(string s)
		{
			int n=0;
			for (int i=0;i<=s.Length-1;i++)
			{
				if (!System.Char.IsNumber(s[i]))
				{
					n=-1;
					break;
				}
				else
					n++;
			}
			if (n>=1)
				return (int.Parse(s));
			else
				return (-1);
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			int cj=strisnumber(textBox1.Text.Trim());
			if (cj>=0 && cj<=100)
			{
				oleDbConnection1.Open();
				string sql="update ScoreInfo set Score="+textBox1.Text.Trim()+" where ScoreId="+this.Tag.ToString().Trim();
				OleDbCommand cmd=new OleDbCommand(sql,oleDbConnection1);
				cmd.ExecuteNonQuery();
				MessageBox.Show("成绩修改完成");
				oleDbConnection1.Close();
				this.Close();
			}
			else
				MessageBox.Show("分数非法");
		}

		private void button2_Click(object sender, System.EventArgs e)
		{
			this.Close();
		}
	}
}