为什么这不起作用?不执行代码

我正在尝试让文本框自动完成数据库中的值。当我进行子弹测试时，代码将遍历直到下面函数中的if语句。有人可以告诉我为什么我的代码在那if之后不会执行吗？

我正在尝试运行以下内容，但它在if之前不断跳出：

public AutoCompleteStringCollection AutoCompleate(string dataBase, string procedure)
{
        AutoCompleteStringCollection namesCollection =
            new AutoCompleteStringCollection();
        SqlDataReader dReader;
        SqlCommand cmd = new SqlCommand(procedure, con);
        cmd.CommandType = CommandType.StoredProcedure;
        con.Open();
        dReader = cmd.ExecuteReader(); // This is the last place my bullet check 
                                       // gets before it hop's out!
        if (dReader.HasRows == true)
        {
            while (dReader.Read())
                namesCollection.Add(dReader["SystemUser"].ToString());
        }
        con.Close();
        dReader.Close();
        return namesCollection;
    }

其他信息，但请关注以上内容！

---

请询问您是否需要任何信息。 :)

---

对上述内容的呼吁：

textBoxUser.AutoCompleteMode = AutoCompleteMode.Suggest;
textBoxUser.AutoCompleteSource = AutoCompleteSource.CustomSource;
textBoxUser.AutoCompleteCustomSource = 
    DatabaseService.Instance.AutoCompleate("AuditIT", "AutoCompleate");

存储过程：

USE [AuditIT]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
--Allow textboxs to have a autocomplete
 ALTER procedure [dbo].[AutoCompleate] 
 as
 Select distinct SystemUser from SchemaAudit
             order by SystemUser asc

try{
if (dataBase.Length > 0) { procedure = dataBase + ".." + procedure; } //Set procedure to DBNAME..ProcedureName
SqlDataReader dReader;
            SqlCommand cmd = new SqlCommand(procedure, con);
            cmd.CommandType = CommandType.StoredProcedure;
            con.Open();
            dReader = cmd.ExecuteReader(); // This is the last place my bullet check gets before it hop's out!
            if (dReader.HasRows == true)
            {
                while (dReader.Read())
                    namesCollection.Add(dReader["SystemUser"].ToString());
            }
            con.Close();
            dReader.Close();
}
catch(Exception e)
{
    // handle the exception better than me :)
    Console.WriteLine(e.Message);
}