前提
入行已经7,8年了，一直想做一套漂亮点的自定义控件，于是就有了本系列文章。
github：https://github.com/kwwwvagaa/netwinformcontrol
码云：
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nuget
install-package hzh_controls
目录
用处及效果
准备工作
这个用到了基类窗体 （十七）c#winform自定义控件-基类窗体 ，如果不了解可以先移步看一下
开始
添加一个窗体frmloading 继承 frmbase
东西不多，看全部代码
1 // ***********************************************************************
2 // assembly : hzh_controls
3 // created : 2019-09-26
4 //
5 // ***********************************************************************
6 // <copyright file="frmloading.cs">
7 // copyright by huang zhenghui(黄正辉) all, qq group:568015492 qq:623128629 email:623128629@qq.com
8 // </copyright>
9 //
10 // blog: https://www.cnblogs.com/bfyx
11 // github：https://github.com/kwwwvagaa/netwinformcontrol
12 // gitee：https://gitee.com/kwwwvagaa/net_winform_custom_control.git
13 //
14 // if you use this code, please keep this note.
15 // ***********************************************************************
16 using system;
17 using system.collections.generic;
18 using system.componentmodel;
19 using system.data;
20 using system.drawing;
21 using system.linq;
22 using system.text;
23 using system.threading;
24 using system.windows.forms;
25
26 namespace hzh_controls.forms
27 {
28 /// <summary>
29 /// class frmloading.
30 /// implements the <see cref="hzh_controls.forms.frmbase" />
31 /// </summary>
32 /// <seealso cref="hzh_controls.forms.frmbase" />
33 public partial class frmloading : frmbase
34 {
35 /// <summary>
36 /// the update database worker
37 /// </summary>
38 backgroundworker updatedbworker = new backgroundworker();
39 /// <summary>
40 /// 获取或设置加载任务
41 /// </summary>
42 /// <value>the background work action.</value>
43 public action backgroundworkaction
44 {
45 get;
46 set;
47 }
48 /// <summary>
49 /// 设置当前执行进度及任务名称，key:任务进度，取值0-100 value：当前任务名称
50 /// </summary>
51 /// <value>the current msg.</value>
52 public keyvaluepair<int, string> currentmsg
53 {
54 set
55 {
56 this.updatedbworker.reportprogress(value.key, value.value);
57 }
58 }
59 /// <summary>
60 /// initializes a new instance of the <see cref="frmloading"/> class.
61 /// </summary>
62 public frmloading()
63 {
64 initializecomponent();
65 this.updatedbworker.workerreportsprogress = true;
66 this.updatedbworker.workersupportscancellation = true;
67 this.updatedbworker.dowork += new doworkeventhandler(this.backgroundworker1_dowork);
68 this.updatedbworker.progresschanged += new progresschangedeventhandler(this.backgroundworker1_progresschanged);
69 }
70 /// <summary>
71 /// 设置进度信息，重写此函数可以处理界面信息绑定
72 /// </summary>
73 /// <param name="strtext">进度任务名称</param>
74 /// <param name="intvalue">进度值</param>
75 protected virtual void bindingprocessmsg(string strtext, int intvalue)
76 {
77
78 }
79
80 /// <summary>
81 /// sets the message.
82 /// </summary>
83 /// <param name="strtext">the string text.</param>
84 /// <param name="intvalue">the int value.</param>
85 private void setmessage(string strtext, int intvalue)
86 {
87 if (this.invokerequired)
88 {
89 this.begininvoke(new methodinvoker(delegate() { setmessage(strtext, intvalue); }));
90 }
91 else
92 {
93 bindingprocessmsg(strtext, intvalue);
94 }
95 }
96
97 /// <summary>
98 /// handles the load event of the frmloading control.
99 /// </summary>
100 /// <param name="sender">the source of the event.</param>
101 /// <param name="e">the <see cref="eventargs"/> instance containing the event data.</param>
102 private void frmloading_load(object sender, eventargs e)
103 {
104 if (controlhelper.isdesignmode())
105 return;
106 this.updatedbworker.runworkerasync();
107 }
108
109 /// <summary>
110 /// handles the dowork event of the backgroundworker1 control.
111 /// </summary>
112 /// <param name="sender">the source of the event.</param>
113 /// <param name="e">the <see cref="doworkeventargs"/> instance containing the event data.</param>
114 private void backgroundworker1_dowork(object sender, doworkeventargs e)
115 {
116 if (this.backgroundworkaction != null)
117 {
118 this.backgroundworkaction();
119 }
120 thread.sleep(100);
121 if (base.invokerequired)
122 {
123 base.begininvoke(new methodinvoker(delegate
124 {
125 base.close();
126 }));
127 }
128 else
129 {
130 base.close();
131 }
132 }
133
134 /// <summary>
135 /// handles the progresschanged event of the backgroundworker1 control.
136 /// </summary>
137 /// <param name="sender">the source of the event.</param>
138 /// <param name="e">the <see cref="progresschangedeventargs"/> instance containing the event data.</param>
139 private void backgroundworker1_progresschanged(object sender, progresschangedeventargs e)
140 {
141 setmessage((e.userstate == null) ? "" : e.userstate.tostring(), e.progresspercentage);
142 }
143 }
144 }
说明：
backgroundworkaction：加载资源任务函数
currentmsg：当前需要显示的进度信息，key:任务进度，取值0-100 value：当前任务名称
bindingprocessmsg：向界面绑定数据，子类需要重写此函数来实现向界面绑定显示数据
示例：
添加一个窗体frmtestloading 继承frmloading
添加一个文本label1显示进度信息文字
添加一个进度条ucprocesslineext1显示进度值
重新bindingprocessmsg绑定信息
1 protected override void bindingprocessmsg(string strtext, int intvalue)
2 {
3 label1.text = strtext;
4 this.ucprocesslineext1.value = intvalue;
5 }
调用
1 frmtestloading frmloading = new frmtestloading();
2 frmloading.backgroundworkaction = delegate()
3 {
4 try
5 {
6 frmloading.currentmsg = new keyvaluepair<int, string>(1, "正在初始化配置...");
7 thread.sleep(1000);
8 frmloading.currentmsg = new keyvaluepair<int, string>(10, "正在加载第一个资源...");
9 thread.sleep(1000);
10 frmloading.currentmsg = new keyvaluepair<int, string>(20, "正在加载第二个资源...");
11 thread.sleep(1000);
12 frmloading.currentmsg = new keyvaluepair<int, string>(30, "正在加载第三个资源...");
13 thread.sleep(1000);
14 frmloading.currentmsg = new keyvaluepair<int, string>(40, "正在加载第四个资源...");
15 thread.sleep(1000);
16 frmloading.currentmsg = new keyvaluepair<int, string>(50, "正在加载第五个资源...");
17 thread.sleep(1000);
18 frmloading.currentmsg = new keyvaluepair<int, string>(60, "正在加载第六个资源...");
19 thread.sleep(1000);
20 frmloading.currentmsg = new keyvaluepair<int, string>(70, "正在加载第七个资源...");
21 thread.sleep(1000);
22 frmloading.currentmsg = new keyvaluepair<int, string>(80, "正在加载第八个资源...");
23 thread.sleep(1000);
24 frmloading.currentmsg = new keyvaluepair<int, string>(90, "正在加载第九个资源...");
25 thread.sleep(1000);
26 frmloading.currentmsg = new keyvaluepair<int, string>(1000, "数据加载完成...");
27 thread.sleep(1000);
28 }
29 catch (exception ex)
30 {
31 messagebox.show("加载资源时出现错误");
32 }
33 };
34 frmloading.showdialog();
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