本文整理汇总了C#中System.Net.HttpWebRequest.IfModifiedSince属性的典型用法代码示例。如果您正苦于以下问题：C# HttpWebRequest.IfModifiedSince属性的具体用法？C# HttpWebRequest.IfModifiedSince怎么用？C# HttpWebRequest.IfModifiedSince使用的例子？那么恭喜您, 这里精选的属性代码示例或许可以为您提供帮助。
在下文中一共展示了HttpWebRequest.IfModifiedSince属性的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，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: Uri
// Create a new 'Uri' object with the mentioned string.
Uri myUri =new Uri("http://www.contoso.com");
// Create a new 'HttpWebRequest' object with the above 'Uri' object.
HttpWebRequest myHttpWebRequest= (HttpWebRequest)WebRequest.Create(myUri);
// Create a new 'DateTime' object.
DateTime targetDate = DateTime.Now;
// Set a target date of a week ago
targetDate.AddDays(-7.0);
myHttpWebRequest.IfModifiedSince = targetDate;
try
{
// Assign the response object of 'HttpWebRequest' to a 'HttpWebResponse' variable.
HttpWebResponse myHttpWebResponse=(HttpWebResponse)myHttpWebRequest.GetResponse();
Console.WriteLine("Response headers for recently modified page\n{0}\n",myHttpWebResponse.Headers);
Stream streamResponse=myHttpWebResponse.GetResponseStream();
StreamReader streamRead = new StreamReader( streamResponse );
Char[] readBuff = new Char[256];
int count = streamRead.Read( readBuff, 0, 256 );
Console.WriteLine("\nThe contents of Html Page are : \n");
while (count > 0)
{
String outputData = new String(readBuff, 0, count);
Console.Write(outputData);
count = streamRead.Read(readBuff, 0, 256);
}
// Close the Stream object.
streamResponse.Close();
streamRead.Close();
// Release the HttpWebResponse Resource.
myHttpWebResponse.Close();
Console.WriteLine("\nPress 'Enter' key to continue.................");
Console.Read();
}
catch(WebException e)
{
if (e.Response != null)
{
if ( ((HttpWebResponse)e.Response).StatusCode == HttpStatusCode.NotModified)
Console.WriteLine("\nThe page has not been modified since "+targetDate);
else
Console.WriteLine("\nUnexpected status code = " + ((HttpWebResponse)e.Response).StatusCode);
}
else
{
Console.WriteLine("\nUnexpected Web Exception " + e.Message);
}
}