default.aspx.cs

一个ASP.NET下的中文内容管理和社区系统

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;

namespace ASPNET.StarterKit.Communities.Admin.EditImages
{
	/// <summary>
	/// Summary description for _Default.
	/// </summary>
	public class _Default : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.DataGrid dgrdImages;
		protected System.Web.UI.WebControls.Panel pnlImages;
		protected System.Web.UI.WebControls.Panel pnlNoImages;
	
		#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.dgrdImages.ItemCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.Item_Click);
			this.dgrdImages.PageIndexChanged += new System.Web.UI.WebControls.DataGridPageChangedEventHandler(this.PageIndex_Changed);
			this.dgrdImages.ItemDataBound += new System.Web.UI.WebControls.DataGridItemEventHandler(this.DataGrid_ItemDataBound);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion


		//*******************************************************
		//
		// Bind the images to the DataGrid when the page
		// first loads.
		//
		//*******************************************************
	    
		void Page_Load(object sender, System.EventArgs e) {
			if (!Page.IsPostBack)
				BindImages();
		}
	    
	    
		//*******************************************************
		//
		// Displays the next page of images.
		//
		//*******************************************************
	    
		void PageIndex_Changed(Object s, DataGridPageChangedEventArgs e) {
			dgrdImages.CurrentPageIndex = e.NewPageIndex;
			BindImages();
		}
	    
	    
		//*******************************************************
		//
		// Get the images and bind them to the DataGrid.
		//
		//*******************************************************
	    
		void BindImages() {
			dgrdImages.DataSource = ImageUtility.GetAllCommunityImages();
			dgrdImages.DataKeyField = "Image_FileName";
			dgrdImages.DataBind();
	    
			// show message when no images
			if (dgrdImages.Items.Count == 0) {
				pnlNoImages.Visible = true;
				dgrdImages.Visible = false;
			}
		}

		//*******************************************************
		//
		// Add delete confirmation to each delete button.
		//
		//*******************************************************
	    
		private void DataGrid_ItemDataBound(Object s, DataGridItemEventArgs e) {
			if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) {
				string imageName = (string)dgrdImages.DataKeys[e.Item.ItemIndex];
				ImageButton btnDelete = (ImageButton)e.Item.FindControl("btnDelete");
				btnDelete.Attributes.Add("onclick",String.Format("return confirm('Are you sure you want to delete the \"{0}\" image?')", imageName));

			}
		}

	    
		//*******************************************************
		//
		// User clicked the Delete button, show delete warning
		// before deleting image.
		//
		//*******************************************************
	    
		void Item_Click(Object s, DataGridCommandEventArgs e) {
			if (e.CommandName=="Delete") {
				string imageName = (string)dgrdImages.DataKeys[e.Item.ItemIndex];
				ImageUtility.DeleteCommunityImage(imageName);
				BindImages();
			}
		}



	}
}