dynamic sql query filtering in csharp

To create a dynamic SQL query with filtering in C#, you can use SQL parameters to avoid SQL injection attacks. You can build your SQL query dynamically based on user inputs, and use SqlParameters to safely pass user inputs to the SQL query.

Here is an example of how to implement dynamic SQL querying in C# with filtering:


main.cs
string query = "SELECT * FROM myTable WHERE 1=1 "; // Starting query

if (!string.IsNullOrEmpty(name))
{
    query += " AND name=@name"; // Append to query
    parameters.Add(new SqlParameter("@name", name)); // Add parameter
}
if (age.HasValue)
{
    query += " AND age=@age"; // Append to query
    parameters.Add(new SqlParameter("@age", age)); // Add parameter
}
// Add more if statements for additional filter parameters

// Execute query
using (SqlConnection connection = new SqlConnection(connectionString))
{
    connection.Open();
    using (SqlCommand command = new SqlCommand(query, connection))
    {
        foreach (SqlParameter parameter in parameters)
        {
            command.Parameters.Add(parameter);
        }
        using (SqlDataReader reader = command.ExecuteReader())
        {
            // Read results
        }
    }
}
854 chars
31 lines

In this example, we start with a base SQL query and build upon it with conditional statements based on user inputs for filtering criteria. We then add the SQL parameters to the SqlCommand object to safely pass user inputs to the SQL query. Finally, we execute the query and read the results.

similar csharp code snippets

create a sql server queue processor in csharp

query to reserve a slot in csharp

generate dynamic query filtering in csharp

create a sql server service broker queue processor in csharp

query sql database in csharp

get data from db by id in csharp

query to book for a slot in csharp

implement a custom sql iqueryprovider in csharp

find the index of an element in an array in csharp

remove an element from the beginning of an array in csharp

related categories