关于C#中的define问题
#define语句应该放在什么位置啊 --------------------编程问答-------------------- Error 1 Cannot define/undefine preprocessor symbols after first token in file c:\users\zou\documents\visual studio 11\Projects\hongtushuma\hongtushuma\Form1.cs 13 2 hongtushuma--------------------编程问答-------------------- Error 1 Cannot define/undefine preprocessor symbols after first token in file c:\users\zou\documents\visual studio 11\Projects\hongtushuma\hongtushuma\Form1.cs 13 2 hongtushuma
--------------------编程问答-------------------- using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Timers;
#define CLIENT 客户名称
/define TYPE 业务类型
/define PRICE 单价
/define QUANTITY 数量
/define SUM 总金额
/define DISCOUNT 折扣
/define TIME 成交时间
/define NOTE 备注
namespace hongtushuma
{
public partial class Form1 : Form
{
DataGridView dgv;
string constr;
SqlDataAdapter da; --------------------编程问答-------------------- 放在任何非编译预处理指令的语句之前, --------------------编程问答-------------------- c#不是c++,#define只能定义符号,不能给符号赋值,
这个写法是错的,
#define CLIENT 客户名称
只能这样写:
#define CLIENT --------------------编程问答-------------------- 我想在C#中实现 类似于C语言的 #define CLIENT 客户名称
应该如何做呢 --------------------编程问答-------------------- 完全没人了吗 --------------------编程问答-------------------- 用常量:不过只能定义在类里面:
public const string CLIENT="客户名称";
--------------------编程问答-------------------- 範例
// preprocessor_if.cs
#define DEBUG
#define VC_V7
using System;
public class MyClass
{
static void Main()
{
#if (DEBUG && !VC_V7)
Console.WriteLine("DEBUG is defined");
#elif (!DEBUG && VC_V7)
Console.WriteLine("VC_V7 is defined");
#elif (DEBUG && VC_V7)
Console.WriteLine("DEBUG and VC_V7 are defined");
#else
Console.WriteLine("DEBUG and VC_V7 are not defined");
#endif
}
}
輸出
DEBUG and VC_V7 are defined
补充:.NET技术 , C#