如何在变量中获取方法生成的值，可以在按钮单击时访问该变量 [英] How do I get the value generated by a method in a variable which can be accessible on button click

问题描述

我试图生成随机数n我正在使用winform c＃代码。我想一次发送生成的随机数到数据库和我的邮件。问题是每次上次生成的随机数被连接。但是这不应该发生我如何限制它。



我尝试过：

 public static string strrandom = string.Empty; 
 
 void Generate_OTP（）
 {
 
} 
 

解决方案

最简单的解决方案是返回值，而不是使用全局变量：

 private static Random objran = new Random（）; 
私有静态字符串Generate_OTP（）
 {
 string strRandom =; 
 string chars =0123456789; 
 int No_of_Characters = 6; 
 for（int i = 0; i< No_of_Characters; i ++）
 {
 int pos = objran.Next（1，chars.Length）; 
 string newChar = chars [pos] .ToString（）; 
 strRandom + = newChar; 
 chars = chars.Replace（newChar，）; 
} 
返回strRandom; 
} 
 

然后你就这样使用它：

 SQL.Parameters.AddWithValue（TEXT_ME_RESET_PASSWORD，Generate_OTP（ ））; 

i tried to generate random numbers n i was using winform c# code . i want to send generated random number at a time to database and my mail.here the problem is every time previous generated random num is getting concatenated .but this should not happen how do i restrict it.

What I have tried:

public static string strrandom = string.Empty;

      void Generate_OTP()
      {

         }

解决方案

Simplest solution is to return the value, instead of using a "global variable":

private static Random objran = new Random();
private static string Generate_OTP()
    {
    string strRandom = "";
    string chars = "0123456789";
    int No_of_Characters = 6;
    for (int i = 0; i < No_of_Characters; i++)
        {
        int pos = objran.Next(1, chars.Length);
        string newChar = chars[pos].ToString();
        strRandom += newChar;
        chars = chars.Replace(newChar, "");
        }
    return strRandom;
    }

You then just use it like this:

SQL.Parameters.AddWithValue("TEXT_ME_RESET_PASSWORD", Generate_OTP());

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