mydatagrid.aspx.cs

ASP C#代码实例 适合初学人士学习使用

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.Configuration;

namespace Example_6_5
{
	/// <summary>
	/// Summary description for MyDataGrid.
	/// </summary>
	public class MyDataGrid : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.DataGrid DataGridList;
		protected System.Web.UI.WebControls.Button AddColumnBtn;
		private readonly string SQLCONNECTIONSTRING = ConfigurationSettings.AppSettings["SQLCONNECTIONSTRING"].ToString();

		private void Page_Load(object sender, System.EventArgs e)
		{
			if(!Page.IsPostBack)
			{
				///从数据库获取数据，并绑定控件的数据
				BindDataGridData();
			}
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{    
			this.AddColumnBtn.Click += new System.EventHandler(this.AddColumnBtn_Click);
			this.ID = "DataGridList";
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void BindDataGridData()
		{
			///创建访问数据库的链接
			String cmdText = "SELECT Top 10 * FROM Staff ORDER BY Staff_ID";
			SqlConnection myConnection = new SqlConnection(SQLCONNECTIONSTRING);
			SqlCommand myCommand = new SqlCommand(cmdText,myConnection);

			///打开数据库链接，并执行查询操作
			myConnection.Open();
			SqlDataReader dr = myCommand.ExecuteReader();
			
			///设置DataList控件的数据源，并绑定控件的数据
			DataGridList.DataSource = dr;
			DataGridList.DataBind();

			///关闭数据库的链接
			dr.Close();
			myConnection.Close();
		}

		private void AddColumnBtn_Click(object sender, System.EventArgs e)
		{
			///动态添加新的数据列
			BoundColumn column = new BoundColumn();											  ; 
			column.HeaderText = "移动电话";
		    ///设置列的数据表达式
			column.DataField = "Mobile";
			DataGridList.Columns.Add(column);

			///重新绑定DataGrid控件的数据
			BindDataGridData();
		}

	}
}