显示照片自定义控件
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using PhotoManage;
namespace PhotoControl
{
[DefaultProperty("PhotoID")]
[ToolboxData("<{0}:PhotoImage runat=server></{0}:PhotoImage>")]
public class PhotoImage : WebControl
{
[Bindable(true)]
[Category("Appearance")]
[DefaultValue("")]
[Localizable(true)]
private string _PhotoID;
private string _NavigateUrl;
private Targer _Target;
private string _SqlConn;
private string _ToolTip;
private string _NOPhotoUrl;
/// <summary>
/// 数据库链接字符串
/// </summary>
[Description("数据库链接字符串"), Category("Appearance")]
public string SqlConn
{
get
{
return _SqlConn;
}
set
{
_SqlConn = value;
}
}
/// <summary>
/// 要显示的照片ID
/// </summary>
[Description("要显示的照片ID"), Category("Appearance")]
public string PhotoID
{
get
{
return _PhotoID;
}
set
{
_PhotoID = value;
}
}
/// <summary>
/// 链接地址
/// </summary>
[Description("链接地址"), Category("Appearance")]
public string NavigateUrl
{
get
{
return ((_NavigateUrl == null) ? String.Empty : _NavigateUrl);
}
set
{
_NavigateUrl = value;
}
}
/// <summary>
/// 链接打开方式
/// </summary>
[Description("链接打开方式"), Category("Appearance")]
//[DefaultValue("_blank")]
public Targer Target
{
get
{
return _Target;
}
set
{
_Target = value;
}
}
/// <summary>
/// 将鼠标移到控件上时显示的工具提示。
/// </summary>
[Description("将鼠标移到控件上时显示的工具提示。"), Category("Appearance")]
public string ToolTip
{
get
{
return ((_ToolTip == null) ? String.Empty : _ToolTip);
}
set
{
_ToolTip = value;
}
}
/// <summary>
/// 无照片时使用的替换图片
/// </summary>
[Description("无照片时使用的替换图片"), Category("Appearance")]
public string NOPhotoUrl
{
get
{
return ((_NOPhotoUrl == null) ? String.Empty : _NOPhotoUrl);
}
set
{
_NOPhotoUrl = value;
}
}
protected override void RenderContents(HtmlTextWriter output)
{
string outStr = "";
if (this.PhotoID != null && this.PhotoID != "" && this.SqlConn != null && this.SqlConn != "")
{
PhotoDetail pDetail = new PhotoManage.PhotoDB(this.SqlConn).getPhotoDetail(this.PhotoID);
if (pDetail != null)
{
string tar = "";
switch (this.Target)
{
case Targer._blank: tar = "_blank"; break;
case Targer._parent: tar = "_parent"; break;
case Targer._search: tar = "_search"; break;
case Targer._self: tar = "_self"; break;
case Targer._top: tar = "_top"; break;
}
if (this.NavigateUrl == null || this.NavigateUrl == string.Empty)
this.NavigateUrl = pDetail.PhotoPath;
if (this.Height.IsEmpty != true && this.Width.IsEmpty != true)
outStr = "<a href=\"" + this.NavigateUrl + "\" target=\"" + tar + "\"><img border=\"0\" height=\"" + this.Height + "\" width=\"" + this.Width + "\" src=\"" + pDetail.SmallPhotoPath + "\" Alt=\"" + this.ToolTip + "\"/></a>";
else if (this.Height.IsEmpty == true && this.Width.IsEmpty == false)
outStr = "<a href=\"" + this.NavigateUrl + "\" target=\"" + tar + "\"><img border=\"0\" width=\"" + this.Width + "\" src=\"" + pDetail.SmallPhotoPath + "\" Alt=\"" + this.ToolTip + "\"/></a>";
else if (this.Height.IsEmpty == false && this.Width.IsEmpty == true)
outStr = "<a href=\"" + this.NavigateUrl + "\" target=\"" + tar + "\"><img border=\"0\" height=\"" + this.Height + "\" src=\"" + pDetail.SmallPhotoPath + "\" Alt=\"" + this.ToolTip + "\"/></a>";
else
outStr = "<a href=\"" + this.NavigateUrl + "\" target=\"" + tar + "\"><img border=\"0\" src=\"" + pDetail.SmallPhotoPath + "\" Alt=\"" + this.ToolTip + "\"/></a>";
output.Write(outStr);
return;
}
else
{
outStr = "<img border=\"0\" src=\"" + this.NOPhotoUrl + "\" alt=\"暂无照片\"";
output.Write(outStr);
return;
}
}
else
{
outStr = "<img border=\"0\" alt=\"未提供属性SqlConn或者属性PhotoID\"";
output.Write(outStr);
return;
}
}
}
public enum Targer
{
_blank = 0,
_parent,
_search,
_self,
_top
}
}
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调用部分:
PhotoImage1.PhotoID = "200DBF2A-5DE1-411C-8525-243B4D6D7177";
PhotoImage1.SqlConn = sqlURL;
PhotoImage1.NavigateUrl = http://www.qq.com";
PhotoImage1.ToolTip = "腾讯";
PhotoImage1.Target = PhotoControl.Targer._blank;
PhotoImage1.NOPhotoUrl = "Alite.gif";
PhotoImage1.Width = 50;
PhotoImage1.Height = 60;