小编Bri*_*ice的帖子

我对以下问题感到困惑;

我正在尝试使用SqlDataReader检索记录(列'EmployeeId'(int)).

当我直接在服务器上运行查询时,我正确地获得了记录.当我运行相同的过程来获取另一列(字符串)时,我正确地获得了记录.

我认为问题是由于我试图获得一个int,程序跳过了

while (mySqlDbDataReader.Read())

并直接去

catch (Exception eMsg1)
            {

这是完整的程序

public string getUserId()
{
    //Check user details against login in Db
    //Local variables to capture values from Db
    string varId = "";

    //Connection string
    conn = sqlDbConnection.GetConnection();
    SqlCommand newCmd = conn.CreateCommand();
    newCmd.Connection = conn;
    newCmd.CommandType = CommandType.Text;

    //Query
    userCredentials connectedUser = new userCredentials();
    newCmd.CommandText = "SELECT EmployeeId FROM tblEmployees WHERE WinLogin='" + connectedUser.getWindowsLogin() + "';";

    //Connect
    newCmd.Connection = conn;
    conn.Open();

    //Utilisation du try-catch permettant de fermer …