How to use Contains using C #
I have a DataTable with a primary key with multiple columns
dt.PrimaryKey = new DataColumn[] {dt.Columns["Name"], dt.Columns["Type"] };
Now I want to check if my DataTable contains dt (Adarsh, Developer)
I need to pass two values to Contains Method
I tried using the following which doesn't seem to work
DataRow dr = dt.Rows(e.RowIndex);
DataRow drNew = dt.NewRow();
drNew["Name"] = dr["Name"];
drNew["Type"] = dr["Type"];
drNew["Address"] = dr["Address"];
if(dt.Rows.Contains(drNew["Name"].ToString(), drNew["Type"].ToString())) //This gives me an error
{
}
thanks in advance
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2 answers
The overload DataRowCollection.Contains
has one parameter:, Object[] keys
but you are trying to pass two arguments.
You need to wrap your keys in Object[]
:
dt.Rows.Contains(new object[]{first_value, second_value})
If you find it ugly, you can wrap it up with a simple extension method like this:
public static class Extenstions
{
public static bool Contains(this DataRowCollection c, params object[] args)
{
return c.Contains(args);
}
}
which will allow you to call it the way you do, like
dt.Rows.Contains(first_value, second_value)
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