Incorrect syntax near stored procedure error

Question

I am updating a long list of entries. In my code, everything works as predicted until it completes the request. I get

Incorrect syntax next to 'TempUpdatePhysicalCityStateZip'

(my name is the stored procedure). I tested it using SQL Server Management Studio and it works fine. So, I'm not quite sure where I made a mistake. Below is my stored procedure and code:

ALTER PROCEDURE [dbo].[TempUpdateCityStateZip] 
    @StoreNo nvarchar (11),
    @City nvarchar(50),
    @State nvarchar(2),
    @Zip nvarchar(5)    
AS
BEGIN
    SET NOCOUNT ON;

    UPDATE StoreContact
    SET City = @City, State = @State, Zip = @Zip
    WHERE StoreNo = @StoreNo
END

Here is my code:

Dictionary<string, string> CityStateZipList = getCityStateZipList(dbPath);

using (SqlConnection conn = new SqlConnection(dbPath))
{
    conn.Open();

    SqlCommand cmdUpdate = new SqlCommand("TempUpdateCityStateZip", conn);

    foreach (KeyValuePair<string, string> frKeyValue in CityStateZipList)
    {
        cmdUpdate.Parameters.Clear();

        string[] strCityStateZip = frKeyValue.Value.Split(' ');
        cmdUpdate.Parameters.AddWithValue("StoreNo", frKeyValue.Key.ToString());

        foreach (String i in strCityStateZip)
        {
            double zipCode;

            if (i.Length == 2)
            {
                cmdUpdate.Parameters.AddWithValue("State", i);
            }
            else if (i.Length == 5 && double.TryParse(i, out zipCode))
            {
                cmdUpdate.Parameters.AddWithValue("Zip", i);
            }
            else
            {
                cmdUpdate.Parameters.AddWithValue("City", i);
            }
        }

        cmdUpdate.ExecuteNonQuery();
    }
}

Answer 1

I believe that you can get this cryptic error message if you do not specify the type of command:

cmdUpdate.CommandType = CommandType.StoredProcedure;

Answer 2

Don't you need the @ sign before the parameter?

 cmdUpdate.Parameters.AddWithValue("@State", i);

FWIW, , , , , . CityStateZipList, , , , .