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 CommonFunction
{
	/// <summary>
	/// ImageSize 的摘要说明。
	/// </summary>
	public class ImageSize : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.HtmlControls.HtmlInputFile upImage;
		protected System.Web.UI.WebControls.TextBox txtHeight;
		protected System.Web.UI.WebControls.Label Label2;
		protected System.Web.UI.WebControls.Label Label3;
		protected System.Web.UI.WebControls.TextBox txtWidth;
		protected System.Web.UI.WebControls.Button btnGet;

		protected string imgPath;
		protected string fileExtName;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN：该调用是 ASP.NET Web 窗体设计器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <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.btnGet.Click += new System.EventHandler(this.btnGet_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void btnGet_Click(object sender, System.EventArgs e)
		{
			if(upImage.PostedFile.FileName != "")
			{
				imgPath =upImage.PostedFile.FileName;
				fileExtName = imgPath.Substring(imgPath.LastIndexOf(".")+1,3);

				if(fileExtName !="gif" && fileExtName != "jpg")
				{
					Response.Write("请选择GIF和JPG格式的图片");
				}
				else
				{
					System.Drawing.Image image =  System.Drawing.Image.FromFile(imgPath);
					txtHeight.Text = image.Height.ToString();
					txtWidth.Text = image.Width.ToString();
				}
			}
			else
			{
				Response.Write("请选择图片!");
			}
		}
	}
}
