我正在尝试编写一个过程来检查 SQL 表中是否有一些数据。
然后我想根据是否存在做一些事情。
所以，我有这个连接到数据库的代码，它正在选择我想从表中获取的数据。
public List<MedidasAdoptar> leerMedidasAdoptar()
{
DataSet Datos = new DataSet();
string connectionString = "Initial Catalog=MyDatabase;Data Source=MyServer;Integrated Security=false;User ID=SQLUser;Password=SQLPass;";
string selectCommand =
"SELECT [Número medida], [Cód_ Cliente], [Nombre Cliente], [Cód_ obra], [Nombre obra], Tipo, [Cód_ Medida], [Descripción Medida], [Respuesta Medida] FROM [MyDatabase$My table] " +
"WHERE [Cód_ Cliente] = "+codigoCliente+" AND [Cód_ obra] = "+codigoObra;
using (var MyConnection = new SqlConnection(connectionString))
using (var MyDataAdapter = new SqlDataAdapter(selectCommand, MyConnection))
{
MyDataAdapter.SelectCommand.CommandType = CommandType.Text;
MyDataAdapter.Fill(Datos);
MyDataAdapter.Dispose();
MyConnection.Close();
}
int i;
//Right here (If it is possible) I want to determine if there is some data in table
try
{
//...doing some stuff
} catch (SqlException e)
{
string msg = "";
System.Console.WriteLine(msg);
return new List<MedidasAdoptar>();
}