利用KeyValuePair生成sql键值对csharpVS2015

环境 VS2015 C# 命令行语句测试

如题： 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
/// <summary>
/// 随便定一个
/// </summary>
public class MyMethod
{
public MyMethod()
{
}

//采用排序的Dictionary的好处是方便对数据包进行签名，不用再签名之前再做一次排序
private SortedDictionary<string, object> m_values = new SortedDictionary<string, object>();

/**
* 设置某个字段的值
* @param key 字段名
* @param value 字段值
*/
public void SetValue(string key, object value)
{
m_values[key] = value;
}

/**
* 根据字段名获取某个字段的值
* @param key 字段名
* @return key对应的字段值
*/
public object GetValue(string key)
{
object o = null;
m_values.TryGetValue(key, out o);
return o;
}

/**
* 判断某个字段是否已设置
* @param key 字段名
* @return 若字段key已被设置，则返回true，否则返回false
*/
public bool IsSet(string key)
{
object o = null;
m_values.TryGetValue(key, out o);
if (null != o)
return true;
else
return false;
}
/**
* @获取Dictionary
*/
public SortedDictionary<string, object> GetValues()
{
return m_values;
}

/*-------------------------------------------------------*/
/**
* @values生成插入语句
*/
public string ToSQLStr_Insrt(string dataTable, string condition)
{
string str1 = "";
string str2 = "";
foreach (KeyValuePair<string, object> pair in m_values)
{
if (pair.Value == null)
{
throw new Exception("Data内部含有值为null的字段!");
}
string[] type = pair.Key.ToString().Split(',');
str1 += string.Format(",`{0}`", type[1]);
string Value = pair.Value.ToString();
switch (type[0])
{
case "string":
{
str2 += string.Format(",'{0}'", Value);
}
break;
case "double":
{
str2 += string.Format(",{0:N2}", double.Parse(Value));
}
break;
case "decimal":
{
str2 += string.Format(",{0:N2}", decimal.Parse(Value));
}
break;
case "int":
{
str2 += string.Format(",{0:N}", int.Parse(Value));
}
break;
default:
break;
}
}
string sqlstr = "INSERT INTO `" + dataTable + "` (" + str1.Substring(1) + ") VALUES(" + str2.Substring(1) + ") " + condition;
return sqlstr;
}
/**
* @values生成删除语句
*/
public string ToSQLStr_Delete(string dataTable, string condition)
{
string sqlstr = "DELETE FROM `" + dataTable + "` " + condition;
return sqlstr;
}
/**
* @values格式化成能在Web页面上显示的结果（因为web页面上不能直接输出xml格式的字符串）
*/
public string ToSQLStr_Select(string dataTable, string condition)
{
string str = "";
foreach (KeyValuePair<string, object> pair in m_values)
{
str += string.Format(",`{0}`", pair.Key.ToString());
}
string sqlstr = "SELECT " + str.Substring(1) + " FROM `" + dataTable + "` " + condition;
return sqlstr;
}
/**
* @values生成修改语句
*/
public string ToSQLStr_Update(string dataTable, string condition)
{
string str = "";
foreach (KeyValuePair<string, object> pair in m_values)
{
if (pair.Value == null)
{
throw new Exception("Data内部含有值为null的字段!");
}
string[] type = pair.Key.ToString().Split(',');
string Value = pair.Value.ToString();
switch (type[0])
{
case "string":
{
str += string.Format(",`{0}`='{1}'", type[1], Value);
}
break;
case "double":
{
str += string.Format(",`{0}`='{1:N4}'", type[1], double.Parse(Value));
}
break;
case "decimal":
{
str += string.Format(",`{0}`='{1:N2}'", type[1], decimal.Parse(Value));
}
break;
case "int":
{
str += string.Format(",`{0}`={1:N}", type[1], int.Parse(Value));
}
break;
default:
break;
}
}
string sqlstr = "UPDATE `" + dataTable + "` SET " + str.Substring(1) + " " + condition;
return sqlstr;
}
}
}

调用：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
MyMethod data = new MyMethod();
data.SetValue("string,appid", "111111");//类型，建，值
data.SetValue("double,mch_id", 2222.23156);//类型，建，值
data.SetValue("int,time_stamp", 333);//类型，建，值
data.SetValue("double,nonce_str", 444.00);//类型，建，值
data.SetValue("string,product_id", "55555555");//类型，建，值
Console.WriteLine(data.ToSQLStr_Insrt("cashier_goods", ""));
Console.WriteLine(data.ToSQLStr_Update("cashier_goods", "where a=b"));
Console.WriteLine(data.ToSQLStr_Delete("cashier_goods", "where a=b"));
data = new MyMethod();
data.SetValue("appid", null);//类型，建，值
data.SetValue("mch_id", null);//类型，建，值
data.SetValue("time_stamp", null);//类型，建，值
data.SetValue("nonce_str", null);//类型，建，值
data.SetValue("product_id", null);//类型，建，值
Console.WriteLine(data.ToSQLStr_Select("cashier_goods", "where a=b"));
Console.ReadLine();
}
}
}