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QuestionReading values from app.config file [modified] Pin
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QuestionI cant make a full dynamic query in LINQ Pin
mucahit7-Jul-08 20:15
Membermucahit7-Jul-08 20:15 
I cant make a full dynamic query in LINQ

I have 2 situation methods (only_exp_query, only_tbl_query) those are working.
...
using System.Linq.Dynamic;
using System.Data.Linq;
...
string connString = @"Data Source=.;Initial Catalog=Northwind;Integrated Security=True";
DataClasses1DataContext db = new DataClasses1DataContext(connString);
...
private void only_exp_query()
{
var query = db.Customers
.Where("City=@0", "LONDON")
.OrderBy("CompanyName");
dataGridView1.DataSource = query;
}

private void only_tbl_query()
{
Table<customer> _customer = db.Customers;
var query = from tbl in _customer
select tbl;
dataGridView1.DataSource = query;
}


But i want to run the script below , but it is not working...

private void full_query()
{
var query = db.GetTable("Customers")
.Where("City=@0", "LONDON")
.OrderBy("CompanyName");
dataGridView1.DataSource = query;
}

and then i can try this below script...

private void full_query()
{
Assembly asm = Assembly.GetAssembly(typeof(DataClasses1DataContext));

var query = db.GetTable(asm.GetType("Customer"));
.Where("City == @0 and Orders.Count >= @1", "London", 10)
.OrderBy("CompanyName, City")
.Select("New(CompanyName as Name, Phone)");
dataGridView1.DataSource = query;
}
but it returns the following error:
"ArgumentNullException was unhandled ,Value Cannot be null,Parameter Type"
but i dont know this error.


WHAT CAN I DO?
can you help me please
AnswerRe: I cant make a full dynamic query in LINQ Pin
leppie7-Jul-08 21:04
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GeneralRe: I cant make a full dynamic query in LINQ Pin
mucahit7-Jul-08 22:04
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GeneralRe: I cant make a full dynamic query in LINQ Pin
mucahit7-Jul-08 23:05
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Questionsmart card Data Identification Pin
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QuestionProblems with generic list data structure Pin
sam L7-Jul-08 18:03
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AnswerRe: Problems with generic list data structure Pin
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QuestionSetup and deployment for windows application Pin
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QuestionPerformance Related bug in C# code Pin
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