frmaddclass.cs

我在北大青鸟学习cshop的作业（学生管理系统）！希望大家给以指导。

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data ;
using Aptech.Student.DataAccess;
using Aptech.Student.Common;

namespace 学生管理系统
{
	/// <summary>
	/// frmAddClass 的摘要说明。
	/// </summary>
	public class frmAddClass : System.Windows.Forms.Form
	{
		        frmMain frm;
		private System.Windows.Forms.Button btnExit;
		private System.Windows.Forms.Button btnAdd;
		private System.Windows.Forms.TextBox txtRemark;
		private System.Windows.Forms.TextBox txtClassName;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.DateTimePicker dateTimePicker1;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public frmAddClass(frmMain frm)
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent();
            this.frm =frm;
			//
			// 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.btnExit = new System.Windows.Forms.Button();
			this.btnAdd = new System.Windows.Forms.Button();
			this.txtRemark = new System.Windows.Forms.TextBox();
			this.txtClassName = new System.Windows.Forms.TextBox();
			this.label3 = new System.Windows.Forms.Label();
			this.label2 = new System.Windows.Forms.Label();
			this.label1 = new System.Windows.Forms.Label();
			this.dateTimePicker1 = new System.Windows.Forms.DateTimePicker();
			this.SuspendLayout();
			// 
			// btnExit
			// 
			this.btnExit.Location = new System.Drawing.Point(192, 240);
			this.btnExit.Name = "btnExit";
			this.btnExit.Size = new System.Drawing.Size(94, 32);
			this.btnExit.TabIndex = 15;
			this.btnExit.Text = "关闭";
			this.btnExit.Click += new System.EventHandler(this.btnExit_Click);
			// 
			// btnAdd
			// 
			this.btnAdd.Location = new System.Drawing.Point(64, 240);
			this.btnAdd.Name = "btnAdd";
			this.btnAdd.Size = new System.Drawing.Size(87, 32);
			this.btnAdd.TabIndex = 14;
			this.btnAdd.Text = "建立";
			this.btnAdd.Click += new System.EventHandler(this.btnAdd_Click);
			// 
			// txtRemark
			// 
			this.txtRemark.Location = new System.Drawing.Point(160, 128);
			this.txtRemark.Multiline = true;
			this.txtRemark.Name = "txtRemark";
			this.txtRemark.Size = new System.Drawing.Size(160, 88);
			this.txtRemark.TabIndex = 13;
			this.txtRemark.Text = "";
			// 
			// txtClassName
			// 
			this.txtClassName.Location = new System.Drawing.Point(160, 8);
			this.txtClassName.Name = "txtClassName";
			this.txtClassName.Size = new System.Drawing.Size(152, 21);
			this.txtClassName.TabIndex = 11;
			this.txtClassName.Text = "";
			// 
			// label3
			// 
			this.label3.Location = new System.Drawing.Point(16, 136);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(100, 32);
			this.label3.TabIndex = 10;
			this.label3.Text = "备注：";
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(16, 72);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(100, 32);
			this.label2.TabIndex = 9;
			this.label2.Text = "入学日期：";
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(16, 8);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(100, 32);
			this.label1.TabIndex = 8;
			this.label1.Text = "班级名称：";
			// 
			// dateTimePicker1
			// 
			this.dateTimePicker1.Location = new System.Drawing.Point(168, 72);
			this.dateTimePicker1.Name = "dateTimePicker1";
			this.dateTimePicker1.Size = new System.Drawing.Size(152, 21);
			this.dateTimePicker1.TabIndex = 16;
			// 
			// frmAddClass
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 14);
			this.ClientSize = new System.Drawing.Size(408, 309);
			this.Controls.Add(this.dateTimePicker1);
			this.Controls.Add(this.btnExit);
			this.Controls.Add(this.btnAdd);
			this.Controls.Add(this.txtRemark);
			this.Controls.Add(this.txtClassName);
			this.Controls.Add(this.label3);
			this.Controls.Add(this.label2);
			this.Controls.Add(this.label1);
			this.Name = "frmAddClass";
			this.Text = "frmAddClass";
			this.ResumeLayout(false);

		}
		#endregion

		private void btnAdd_Click(object sender, System.EventArgs e)
		{
          //先判断有没有输入班级名
			if(this.txtClassName.Text=="")
			{
				MessageBox.Show ("请输入班级名称！");
				return;
			}
        //再判断数据库中有没有存在同名班级
			Classs classes=new Classs ();
			System.Data .DataSet dsClass=classes.SelectClass(-1,"");
         
        
			foreach(System.Data.DataRow row in  dsClass.Tables [0].Rows)
			{
				if(this.txtClassName .Text .Trim().Equals(   row[1].ToString()))
				{
					MessageBox.Show ("已经有这个班级了！"); 
					return;

				}
			}
			if(  classes.InsertClass(this.txtClassName.Text,
				this.dateTimePicker1 .Value ,
				this.txtRemark.Text))


			{
				MessageBox.Show ("新班级建立成功");
				this.frm.ShowClass();

			}
			else
			{
				MessageBox.Show ("新班级建立失败");

			}
		
		}

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