C#中返回值封装
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 }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 }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 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
}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);
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原始发表：2015-10-20 ，如有侵权请联系 cloudcommunity@tencent.com 删除
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