本文整理汇总了C#中System.Web.UI.WebControls.AdRotator.Render方法的典型用法代码示例。如果您正苦于以下问题:C# AdRotator.Render方法的具体用法?C# AdRotator.Render怎么用?C# AdRotator.Render使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。
在下文中一共展示了AdRotator.Render方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于我们的系统推荐出更棒的C#代码示例。
示例1: Render
namespace Samples.AspNet.CS.Controls
{
[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name="FullTrust")]
public class CustomADRotatorRender : System.Web.UI.WebControls.AdRotator
{
private const string ApplicationCachePrefix = "CustomAdRotatorCache: ";
protected override void Render(System.Web.UI.HtmlTextWriter writer)
{
string navigateUrl = System.String.Empty;
string imageUrl = System.String.Empty;
string alternateText = System.String.Empty;
// If the value for the Advertisement File is not empty.
if (this.AdvertisementFile.Length > 0 )
{
// Get a random ad.
GetRandomAd(out imageUrl, out navigateUrl, out alternateText);
}
// Create and render a new HyperLink Web control.
System.Web.UI.WebControls.HyperLink bannerLink = new System.Web.UI.WebControls.HyperLink();
foreach(string key in this.Attributes.Keys)
{
bannerLink.Attributes[key] = this.Attributes[key];
}
if (this.ID != null && this.ID.Length > 0)
{
bannerLink.ID = this.ClientID;
}
bannerLink.NavigateUrl = navigateUrl;
bannerLink.Target = this.Target;
bannerLink.AccessKey = this.AccessKey;
bannerLink.Enabled = this.Enabled;
bannerLink.TabIndex = this.TabIndex;
bannerLink.RenderBeginTag(writer);
// Create and render a new Image Web control.
System.Web.UI.WebControls.Image bannerImage = new System.Web.UI.WebControls.Image();
if (ControlStyleCreated)
{
bannerImage.ApplyStyle(this.ControlStyle);
}
bannerImage.AlternateText = alternateText;
bannerImage.ImageUrl = imageUrl;
bannerImage.ToolTip = this.ToolTip;
bannerImage.RenderControl(writer);
bannerLink.RenderEndTag(writer);
}
private void GetRandomAd(out string imageUrl, out string navigateUrl, out string alternateText)
{
// Default output parameters values.
imageUrl = System.String.Empty;
navigateUrl = System.String.Empty;
alternateText = System.String.Empty;
// Try to get the Ads DataSet from the ASP.NET cache.
string physicalPath = MapPathSecure(this.AdvertisementFile);
string fileKey = ApplicationCachePrefix + physicalPath;
System.Web.Caching.Cache cache = System.Web.HttpContext.Current.Cache;
System.Data.DataSet dataSet = cache[fileKey] as System.Data.DataSet;
// If the Ads DataSet was not found in the ASP.NET cache.
if (dataSet == null)
{
// Get the Ads from an XML file.
dataSet = new System.Data.DataSet();
dataSet.ReadXml(physicalPath, System.Data.XmlReadMode.InferSchema);
// Insert the DataSet into the Cache.
// Make sure your AntiVirus software doesn't touch the XMLf file,
// or else the cache will be empty each time the Render method gets called.
cache.Insert(fileKey, dataSet, new System.Web.Caching.CacheDependency(physicalPath));
}
// If Ads were found in the XML File.
int totalAds = dataSet.Tables[0].Rows.Count;
if (totalAds > 0)
{
// Select a random Ad.
System.Random randomNumber = new System.Random();
int selectedAdIndex = randomNumber.Next(totalAds);
// Output the random Ad's values.
imageUrl = dataSet.Tables[0].Rows[selectedAdIndex].ItemArray[0].ToString();
navigateUrl = dataSet.Tables[0].Rows[selectedAdIndex].ItemArray[1].ToString();
alternateText = dataSet.Tables[0].Rows[selectedAdIndex].ItemArray[2].ToString();
}
}
}
}
开发者ID:.NET开发者,项目名称:System.Web.UI.WebControls,代码行数:92,代码来源:AdRotator.Render
注:本文中的System.Web.UI.WebControls.AdRotator.Render方法示例由纯净天空整理自Github/MSDocs等源码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。 |
请发表评论