Question

i wanna Compare a Text with the all records in a table in the database
i wanna do it using Foreach or For loop
as if there is any mail in the database that similar to the one the user enter
i wanna enter the data of the Customer and before he make save i wanna make sure that this customer is not already in the data base
MSSQL server 2005
i am Coding by LINQ

Answer 1

I think you could try:

    IDataReader rd; // Get rd as a DataReader
    while (rd.Read())
    {
        // Compare data here
    }
    rd.Close();

I mean: if you read data you need with a query (returning a IDataReader) you can go trough each record and do what you need.