在DataList中单击ImageButton，显示图片详细信息

本文主要是介绍在DataList中单击ImageButton，显示图片详细信息，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

<% ... @ Page Language="C#" MasterPageFile="~/MasterPage2.master" AutoEventWireup="true"
    CodeFile="ListPhoto.aspx.cs" Inherits="ListPhoto" Title="List Photo"  %>

< asp:Content  ID ="Content1"  ContentPlaceHolderID ="ContentPlaceHolder1"  runat ="Server" >
     < asp:DataList  ID ="dlPhoto"  runat ="server"  RepeatColumns ="4"  RepeatDirection ="Horizontal"
        CellPadding ="0"  Width ="790px"  OnItemCommand ="dlPhoto_ItemCommand" >
         < ItemTemplate >
             < asp:ImageButton  Width ="185"  ID ="ibtnPhoto"  ImageUrl ='<%#  FormatURL(DataBinder.Eval(Container,"DataItem.user_name"),DataBinder.Eval(Container, "DataItem.photo_type_id"),DataBinder.Eval(Container, "DataItem.photo_id")) % > '
                runat="server" AlternateText="click list Details information!" CommandName="Detail" OnClick="ibtnPhoto_Click" /> < br  />
             < asp:Label  ID ="lblPhotoType"  runat ="server"  Text ='<%#  DataBinder.Eval(Container, "DataItem.photo_type_id")% > '
                Visible="false"> </ asp:Label >< br  />
             < asp:Label  ID ="lblPhotoName"  runat ="server"  Text ='<%#  DataBinder.Eval(Container, "DataItem.photo_id")% > '
                Visible="false"> </ asp:Label >
         </ ItemTemplate >
     </ asp:DataList >
</ asp:Content >

using  System;
using  System.Data;
using  System.Configuration;
using  System.Collections;
using  System.Web;
using  System.Web.Security;
using  System.Web.UI;
using  System.Web.UI.WebControls;
using  System.Web.UI.WebControls.WebParts;
using  System.Web.UI.HtmlControls;

public   partial   class  ListPhoto : System.Web.UI.Page
... {
    protected void Page_Load(object sender, EventArgs e)
    ...{
        if(!Page.IsPostBack)
        ...{
            if(!(Convert.ToBoolean(Session["isLogin"])))
            ...{
                Response.Redirect("Login.aspx");
            }
            else
            ...{
                System.Data.SqlClient.SqlConnection conn = new System.Data.SqlClient.SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["DogsManagerConnectionString"].ToString());
                string code,strSQL;
                code = Request.QueryString["code"].ToString();
                if(code == "A")
                ...{
                    strSQL = string.Format("select user_name,photo_type_id,photo_id,photo from E_Photo where user_name='{0}'", Session["name"].ToString());
                }
                else
                ...{
                    strSQL = string.Format("select user_name,photo_type_id,photo_id,photo from E_Photo where user_name='{0}' AND photo_type_id={1}", Session["name"].ToString(),code);
                }
                System.Data.SqlClient.SqlCommand cmd = new System.Data.SqlClient.SqlCommand(strSQL, conn);
                try
                ...{
                    conn.Open();
                    this.dlPhoto.DataSource = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                    this.dlPhoto.DataBind();
                }
                catch(System.Data.SqlClient.SqlException sql)
                ...{
                    Response.Write("wrong information:<br>" + sql.Message);
                }
                finally
                ...{
                    cmd.Dispose();
                    conn.Close();
                }
            }
        }
    }

    protected string FormatURL(object userName, object typeID, object photoID)
    ...{
        return string.Format("ReadImage.aspx?userName={0}&typeID={1}&photoID={2}",
            userName.ToString(), typeID.ToString(), photoID.ToString());
    }
    protected void dlPhoto_ItemCommand(object source, DataListCommandEventArgs e)
    ...{
        if(e.CommandName == "Detail")
        ...{
            string userName = Session["name"].ToString();
            string typeId = ((Label)e.Item.FindControl("lblPhotoType")).Text;
            string photoId = ((Label)e.Item.FindControl("lblPhotoName")).Text;
            string Format = string.Format("ListPhotoDetail.aspx?userName={0}&typeID={1}&photoID={2}",
                userName, typeId, photoId);
            //ImageButton ibtnDetail = (ImageButton)e.Item.FindControl("ibtnPhoto");
            //ImageButton ibtnDetail = (ImageButton)this.dlPhoto.Items[e.Item.ItemIndex].FindControl("ibtnPhoto");
            //添加单击事件
            //ibtnDetail.Click += new ImageClickEventHandler(ibtnDetail_Click);
            respon(Format);
        }
    }
    /**//// <summary>
    /// 在模板列中添加的单击事件
    /// </summary>    
    //void ibtnDetail_Click(object sender, ImageClickEventArgs e)
    //{
    //    Response.Redirect("http://www.baidu.com");
    //}
    void respon(string url)
    ...{
        Response.Write("<script language='javascript'>window.open('"+url+"','newWindow');</script>");
    }
    protected void ibtnPhoto_Click(object sender, ImageClickEventArgs e)
    ...{
        
    }
}

 以下是显示详细页面ListPhotoDetail.aspx对应的ＨＴＭＬ代码：

<% ... @ Page Language="C#" AutoEventWireup="true" CodeFile="ListPhotoDetail.aspx.cs" Inherits="ListPhotoDetail1"  %>

<! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >

< html  xmlns ="http://www.w3.org/1999/xhtml"   >
< head  runat ="server" >
     < title > List Photo Detail </ title >
</ head >
< body >
     < form  id ="form1"  runat ="server" >
     < table  border ="0"  cellpadding ="0"  cellspacing ="0" >
         < tr >
             < td  colspan ="2"  style ="height: 53px" >
                 < span  style ="font-size: 14pt" >< strong > List Details Photo </ strong ></ span ></ td >
         </ tr >
         < tr >
             < td  colspan ="2" >
                 < asp:Image  ID ="imgPhoto"  runat ="server"   /></ td >
         </ tr >
         < tr >
             < td  align ="right"  style ="height: 24px" >
                 < asp:Label  ID ="lblLoadDate"  runat ="server"  Text ="UpLoad Date:" ></ asp:Label ></ td >
             < td  align ="left"  style ="height: 24px" >
                 < asp:TextBox  ID ="txtLoadDate"  runat ="server"  Width ="164px" ></ asp:TextBox ></ td >
         </ tr >
         < tr >
             < td  align ="right" >
                 < asp:Label  ID ="Label2"  runat ="server"  Text ="Description:" ></ asp:Label ></ td >
             < td  align ="left" >
                 < asp:TextBox  ID ="txtDesc"  runat ="server"  Height ="248px"  TextMode ="MultiLine"  Width ="401px" ></ asp:TextBox ></ td >
         </ tr >
     </ table >
         < asp:Button  ID ="btnOK"  runat ="server"  Text ="OK"   />
     </ form >
</ body >
</ html >

以下是对应的后台代码：

using  System;
using  System.Data;
using  System.Configuration;
using  System.Collections;
using  System.Web;
using  System.Web.Security;
using  System.Web.UI;
using  System.Web.UI.WebControls;
using  System.Web.UI.WebControls.WebParts;
using  System.Web.UI.HtmlControls;

public   partial   class  ListPhotoDetail1 : System.Web.UI.Page
... {
    protected void Page_Load(object sender, EventArgs e)
    ...{
        
        if(!Page.IsPostBack)
        ...{
            string username = Request.QueryString["userName"].ToString();
            string typeid = Request.QueryString["typeID"].ToString();
            string photoid = Request.QueryString["photoID"].ToString();
            System.Data.SqlClient.SqlConnection conn = new System.Data.SqlClient.SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["DogsManagerConnectionString"].ToString());
            string strSQL = string.Format("select Photo_Desc,UpLoad_Date from E_Photo where user_name='{0}' and photo_type_id=" +
                "{1} and photo_id='{2}'", username, typeid, photoid);
            System.Data.SqlClient.SqlCommand cmd = new System.Data.SqlClient.SqlCommand(strSQL, conn);
            try
            ...{
                conn.Open();
                System.Data.SqlClient.SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                if(reader.Read())
                ...{
                    //设置其他项
                    this.txtDesc.Text = reader["Photo_Desc"].ToString();
                    this.txtLoadDate.Text = reader["UpLoad_Date"].ToString();
                }
            }
            catch(System.Data.SqlClient.SqlException sql)
            ...{
                throw sql;
            }
            finally
            ...{
                cmd.Dispose();
                conn.Close();
            }
            //设置图片的显示
            this.imgPhoto.ImageUrl = FormatURL(username, typeid, photoid);
        }
    }
    /**//// <summary>
    /// 获取格式化地址
    /// </summary>
    /// <param name="userName">user name</param>
    /// <param name="typeID">phto type id</param>
    /// <param name="photoID">photo number</param>
    /// <returns></returns>
    protected string FormatURL(string userName, string typeID, string photoID)
    ...{
        return string.Format("ReadImage.aspx?userName={0}&typeID={1}&photoID={2}",
            userName, typeID, photoID);
    }
}

这篇关于在DataList中单击ImageButton，显示图片详细信息的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！