Difference between revisions of "OOP Class14"

Revision as of 17:02, 6 May 2014

Parallel

http://msdn.microsoft.com/en-us/library/dd460713(v=vs.110).aspx

samples: http://code.msdn.microsoft.com/windowsdesktop/Samples-for-Parallel-b4b76364

for <csharp> long count = 200000000; short[] shorts = new short[count]; for (long i = 0; i < count; i++)

               {
                   shorts[i] = 1;
               }

</pre>

Parallel.For

short[] shortsP = new short[count];
Parallel.For(0, count, i =>
                    {
                        shortsP[i] = 1;
                    });
</csharp>

Demo

http://iam.colum.edu/oop/classsource/class15/AsyncConsoleApplication.zip

http://iam.colum.edu/oop/classsource/class15/WindowsFormsApplicationAsync.zip

Async
http://msdn.microsoft.com/en-us/library/hh191443.aspx
<csharp>
private void buttonBlock_Click(object sender, EventArgs e)

       {
           textBox1.Text =  DoLongCount();
       }

       //Async call to async method
       private async void buttonAsync_Click(object sender, EventArgs e)
       {
           textBox1.Text = await DoLongAsyncCount();
       }

       private string DoLongCount()
       {
           System.Threading.Thread.Sleep(1000);
           Count++;
           return "count is " + Count;
       }

       //Async Task
       private async Task<string> DoLongAsyncCount()
       {
           await Task.Delay(1000);
           Count++;
           return "count is " + Count;
       }

</csharp>



       <httpRuntime
           executionTimeout="1200"
           maxRequestLength="65536"
       />
   </system.web>

</configuration>
</xml>    
multipart form
<csharp>
<form enctype="multipart/form-data" runat="server">
<tr>

 <td>Select file to upload:</td>
 <td>
 <input id="myfile" type="file" runat="server"></td>

</tr>
<tr>

 <td>
 <input type=button id="btnUploadTheFile" value="Upload" 
       OnServerClick="btnUploadTheFile_Click" runat="server" />
 </td>

</tr>
</form>
</csharp>
Parse the multipart form and save the file msdn library. System.Web.HtmlInputFile.PostedFile Property
<csharp>
void btnUploadTheFile_Click(object Source, EventArgs evArgs) 
{

   //Path to save file
   string strBaseLocation = "";
   
   if (null != myfile.PostedFile) 
   {
       // Get the HTTP posted file instance (to simplify the code) 
       HttpPostedFile postedfile = myfile.PostedFile; 
       
       // Get the filename 
       string filename = new System.IO.FileInfo(postedfile.FileName).Name; 
       string filesize = postedfile.ContentLength.ToString();
       try 
       {
           myfile.PostedFile.SaveAs(strBaseLocation+filename);
           txtOutput.InnerHtml = "File " + strBaseLocation + filename + " uploaded successfully";
       }
       catch (Exception e) 
       {
               txtOutput.InnerHtml = "Error saving " + strBaseLocation + filename + "

"+ e.ToString();

       }
       
       //Do some other stuff 
       //maybe  like send an email to let admin know file was uploaded
   }

}
</csharp>
http://iam.colum.edu/oop/classsource/class14/up.aspx
[up.aspx - source]
[web.config - source]
-->

Final Review
OOP Final Review

Be very familiar with c# syntax
Basic object types (int, bool, string)
Conditional and Branching statements
Arrays and Generics ie List
Understand Classes and Inheritance.
Use some advanced class features such as abstract classes and virtual methods that are overridden
Understand class relationships
Is A
Has A
Uses A
Understand Encapsulation, Abstraction and Polymorphism
Abstraction 
Each class should abstract its behavior in order to increase usability, reuse, and organization. 
Encapsulation
Each class should contain all of the properties and methods it needs. It should only expose what is necessary to outside classes.
Polymorphism
many forms, same code interface but interchangeable classes
Be able to read and create UML Diagrams
Be able to recognize and use simple design patters
The final will be consist of two sections the writtens section and the practical section. The practical section will be open everything excpet open mouth (yes open note open book open web). You will not be ablt to use any of theese resources during the written section.