C#中返回值封装

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在平时开发过程中常常需要取一个方法的返回值，BOSS写了一个返回值类，做个练习以备不时之需:

返回值支持泛型和非泛型先贴上代码：

非泛型返回值类：

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Runtime.Serialization;
 6 
 7 
 8 namespace WindowsFormsApplication31
 9 { 
10     [Serializable]
11 
12     public class ReturnValue
13     {
14         /// <summary>
15         /// 状态：成功、失败
16         /// </summary>
17   
18         public bool State 
19         { 
20             get; 
21             protected set; 
22         }
23 
24         /// <summary>
25         /// 成功消息
26         /// </summary>
27 
28         public string SuccessMessage 
29         { 
30             get; 
31             protected set; 
32         }
33 
34         /// <summary>
35         /// 失败消息
36         /// </summary>
37 
38         public string FailMessage 
39         { 
40             get; 
41             protected set; 
42         }
43    
44 
45         /// <summary>
46         /// 构造器
47         /// </summary>
48         public ReturnValue()
49         {
50             this.State = false;
51             this.SuccessMessage = string.Empty;
52             this.FailMessage = string.Empty;
53         }
54 
55         /// <summary>
56         /// 设置状态
57         /// </summary>
58         /// <param name="state">状态</param>
59         /// <param name="message">消息</param>
60         private void Load(bool state, string message = "")
61         {
62             this.State = state;
63             if (state)
64             {
65                 this.SuccessMessage = message;
66             }
67             else
68             {
69                 this.FailMessage = message;
70             }
71         }
72 
73         /// <summary>
74         /// 设置成功
75         /// </summary>
76         /// <param name="message">成功消息</param>
77         public void Success(string message = "")
78         {
79             this.Load(true, message);
80         }
81 
82         /// <summary>
83         /// 设置失败
84         /// </summary>
85         /// <param name="message">失败消息</param>
86         public void Fail(string message = "")
87         {
88             this.Load(false, message);
89         }
90     }
91 }

View Code

泛型返回值类：

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Runtime.InteropServices;
 6 using System.Runtime.Serialization;
 7 
 8 
 9 
10 
11 namespace WindowsFormsApplication31
12 { 
13     [Serializable]
14 
15     public class ReturnValues<T> : ReturnValue
16     {
17         /// <summary>
18         /// 返回值
19         /// </summary>
20 
21         public T Value
22         {
23             get;
24             set;
25         }
26 
27         /// <summary>
28         /// 设置成功
29         /// </summary>
30         /// <param name="value">值</param>
31         /// <param name="message">成功消息</param>
32         public void Success(T value = default(T), string message = "")
33         {
34             this.State = true;
35             this.Value = value;
36             this.SuccessMessage = message;
37         }
38     }
39 }

View Code

实例：

1.演示窗体：

通过2个文本框输入信息

第一个开始返回文本验证信息

第二个开始按钮测试

2.关键代码：

非泛型：

    #region 返回值（非泛型）
        /// <summary>
        /// 按钮1
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnVerifyEmpty_Click(object sender, EventArgs e)
        {
            ReturnValue rv = VerifyEmpty();
            this.ReturnValueHelper(rv);
        }

        /// <summary>
        /// 按钮1 测试
        /// </summary>
        /// <returns></returns>
        private ReturnValue VerifyEmpty()
        {
            ReturnValue rv = new ReturnValue();
            if (string.IsNullOrEmpty(this.textBox1.Text.Trim()))
            {
                rv.Fail("值为空");
            }
            else
            {
                rv.Success("值非空");
            }
            return rv;
        }

        /// <summary>
        /// 返回值输出
        /// </summary>
        /// <param name="rv"></param>
        private void ReturnValueHelper(ReturnValue rv)
        {
            bool state = rv.State;
            StringBuilder sb = new StringBuilder();
            if (state)
            {
                sb.AppendLine("返回值状态是:True");
                sb.AppendLine("成功消息:" + rv.SuccessMessage);

            }
            else
            {
                sb.AppendLine("返回值状态是:False");
                sb.AppendLine("失败消息:" + rv.FailMessage);
            }
            MessageBox.Show(sb.ToString());
        }
        #endregion

View Code

泛型：

        #region 返回值（泛型）
        private void btnQueryStudent_Click(object sender, EventArgs e)
        {
            //获取姓名
            string studentName = this.textBox2.Text.Trim();
            //获取返回值
            ReturnValues<int> rv = this.GetReturnValues(studentName);
            //输出
            this.ReturnValuesHelper(rv);

        }

        /// <summary>
        /// 获取返回值
        /// </summary>
        /// <param name="rv"></param>
        private ReturnValues<int> GetReturnValues(string name)
        {
            //实例化返回类
            ReturnValues<int> rv = new ReturnValues<int>();

            //构造测试数据，模拟实际开发的取数据操作
            Dictionary<string, int> dic = new Dictionary<string, int>();
            dic.Add("A", 1);
            dic.Add("B", 2);
            dic.Add("C", 3);
            dic.Add("D", 4);
            dic.Add("E", 5);

            //开始判断
            if (dic.Keys.Contains(name))
            {
                rv.Success("数据查找成功");
                rv.Value = dic[name];
            }
            else
            {
                rv.Fail("数据查找失败");
            }
            return rv;
        }
        /// <summary>
        /// 返回值输出
        /// </summary>
        /// <param name="rv"></param>
        private void ReturnValuesHelper(ReturnValues<int> rv)
        {
            bool state = rv.State;
            StringBuilder sb = new StringBuilder();
            if (state)
            {
                sb.AppendLine("返回值状态是:True");
                sb.AppendLine("成功消息:" + rv.SuccessMessage);
                sb.AppendLine("泛型值:" + rv.Value.ToString());

            }
            else
            {
                sb.AppendLine("返回值状态是:False");
                sb.AppendLine("失败消息:" + rv.FailMessage);
            }
            MessageBox.Show(sb.ToString());
        }
        
        #endregion
    }

View Code

3.开始演示:

 //第二个文本只能输入A B C D E才提示成功并且可以得到对应的返回值
            Dictionary<string, int> dic = new Dictionary<string, int>();
            dic.Add("A", 1);
            dic.Add("B", 2);
            dic.Add("C", 3);
            dic.Add("D", 4);
            dic.Add("E", 5);