Pass Array Parameter in SqlCommand

Question

I am trying to pass array parameter to SQL commnd in C# like below, but it does not work. Does anyone meet it before?

string sqlCommand = \"SELECT * from Ta         


        

Answer 1

Use .AddWithValue(), So:

sqlComm.Parameters.AddWithValue("@Age", sb.ToString().TrimEnd(','));

Alternatively, you could use this:

sqlComm.Parameters.Add(
    new SqlParameter("@Age", sb.ToString().TrimEnd(',')) { SqlDbType = SqlDbType. NVarChar }
    );

Your total code sample will look at follows then:

string sqlCommand = "SELECT * from TableA WHERE Age IN (@Age)";
SqlConnection sqlCon = new SqlConnection(connectString);
SqlCommand sqlComm = new SqlCommand();
sqlComm.Connection = sqlCon;
sqlComm.CommandType = System.Data.CommandType.Text;
sqlComm.CommandText = sqlCommand;
sqlComm.CommandTimeout = 300;

StringBuilder sb = new StringBuilder();
foreach (ListItem item in ddlAge.Items)
{
     if (item.Selected)
     {
         sb.Append(item.Text + ",");
     }
}

sqlComm.Parameters.AddWithValue("@Age", sb.ToString().TrimEnd(','));

// OR

// sqlComm.Parameters.Add(new SqlParameter("@Age", sb.ToString().TrimEnd(',')) { SqlDbType = SqlDbType. NVarChar });