C# – The best overloaded method match for XXX has some invalid arguments

asp.netcentity-frameworkentity-framework-5visual studio 2012

I'm a new beginner to the entity framework .

I try to write te following method but i get a compile time error.

 protected static void EntitySQLQuery(AWEntities context)
        {
            string cmd = @"SELECT VALUE c FROM AWEntities.Person AS c WHERE c.FirstName = @FirstName";

            ObjectQuery<Person> persons = new ObjectQuery<Person>(cmd, context);//Error


        }

The best overloaded method match for
'System.Data.Objects.ObjectQuery.ObjectQuery(string,
System.Data.Objects.ObjectContext)' has some invalid arguments

Best Answer

Your AWEntities context object is not recongnized as an ObjectContext. Please check the type of your object. Take a look at definition of ObjectContext and ObjectQuery's constructor

Related Solutions

C# – The best overloaded method match for has some invalid arguments

I think this may have to do with the way in which you imported (I assume) your web service objects. If it's a WCF service, make sure your "Model" is referenced along the different projects, and when adding the service reference, make sure to check the option "Reuse existing Types".

Strcmp on a line read with fgets

strcmp is one of the few functions that has the reverse results of true and false...if the strings are equal, the result is 0, not 1 as you would think....

if (strcmp(a, b)) {
    /* Do something here as the strings are not equal */
} else {
    /* Strings are equal */
}

Speaking of fgets, there is a likelihood that there is a newline attached to the end of the string...you need to get rid of it...

+-+-+-+--+--+
|b|o|b|\n|\0|
+-+-+-+--+--+

To get rid of the newline do this. CAVEATS: Do not use "strlen(aName) - 1", because a line returned by fgets may start with the NUL character - thus the index into the buffer becomes -1:

aName[strcspn(aName, "\n")] = '\0';

+-+-+-+--+
|b|o|b|\0|
+-+-+-+--+

Now, strcmp should return 0...

Best Answer

Related Solutions

C# – The best overloaded method match for has some invalid arguments

Strcmp on a line read with fgets

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