IOC Container is a mechanism to achieve dependency injection to make our classes loosely coupled.
We can achieve inversion of control using 2 ways-
1. Dependency injection pattern
2. Service Locator pattern
There are many IOC Container available in .Net,some of mostly used are as given below…
Yes.
We have to decorate attribute [ActionName] on action to do so.
public static MemoryStream ConvertPDFtoMemoryStream(string pdfUrl)
{
MemoryStream pdfMemoryStream;
WebClient client = new WebClient();
try
{
pdfMemoryStream =
new MemoryStream(client.DownloadData(HttpUtility.UrlDecode(pdfUrl)));
}
finally
{
client.Dispose();
}
return pdfMemoryStream;
}
When you publish your code in release mode on Server and you want to print a line number.You have to follow following steps to achieve this
Step-1 Right click You Project > Property > Package/Publish Web> Uncheck Exclude generated Debug Symbol
Step-2
Save and publish you code You will see PDB file will be generated over there which will track you published code Error.
$(“form”).submit(function () {
// do your stuff here
});
Pass value in Your Partial view as below
@Html.Partial(“~/PathToYourView.cshtml”, null, new ViewDataDictionary { { “VariableName”, “some value” } })
Retrieve the passed in values inside partial view:
@{ string valuePassedIn = this.ViewData.ContainsKey(“VariableName”) ? this.ViewData[“VariableName”].ToString() : string.Empty; }
If you are getting ERROR as below
Solution :
Start the World Wide Web Publishing Service
Click Start, click Run, type services.msc, and then click OK.
In Services, locate the World Wide Web Publishing Service service in the details pane.
Right-click the service, and then click Start.
Hopefully it will work.
FileResult is used to Download physical File from Server to Client Machine
Refer below code having download functionality..
//post method
[Httppost]
public FileResult Download()
{
// logic
//return new FilePathResult(path of File, contentType);
return new FilePathResult(http://aabc.com/file/xyz.xlsx, “application/vnd.ms-excel”);
}
Suppose there is Datatable as below in C#.
Now I want to get all columns in form of array list.
To achieve this we will follow below approach
string[] columnNames = (from dc in dt.Columns.Cast()
select dc.ColumnName).ToArray();
Note : Here dt is Datatable.
IEnumerable<T> Interface in C #
IEnumerable interface is a simple iteration over a collection of a specified type.It has Method GetEnumerator() that iterates through the collection.
Use: Mainly used to work with in memory data i.e List,Array
Example: IEnumerable<Product> products = db.employee.Take(3);
IQueryable Interface in C #
It is basically used to evaluate queries against a specific data source.
Use: Used to query database.e.g. iin LINQ
Example: IQueryable<Product> products = db.employee.Take(3);
Difference:
In IEnumerable All employees will be loaded After Loading all data program will filter
Query run on database- Select * from Employees
In IQueryable Data will be filterd on Database Program will get only top 3 recoreds
Query run on database- Select TOP 3 * from Employees
Dot Net Tricks 