Insert a null value to an int column in sql server

Question

I have a subroutine to insert a record to sql server table. The code:

    public void Insert_Met(int Counts, char Gender)
    {
        Dictionary

        

Answer 1

You could use int? counts instead of int counts, and check the value within your method:

public void InsertMet(int? counts, char gender)
{
    Dictionary parameters = new Dictionary();
    parameters.Add("@Counts", counts.HasValue ? counts.Value : (object)DBNull.Value);
    parameters.Add("@Gender", gender);
    // run a stored procedure ExecuteNonQuery
}

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it is a numericupdown control in windows form. I feel that it is hard to assign a text to an int variable. How to change it?

In order to set the count value appropriately for the above, you could do:

int value = (int)numberUpdowncontrol1.Value;
int? counts = !string.IsNullOrEmpty(numberUpdowncontrol1.Text) ? value : (int?)null;

InsertMet(counts, 'M');