Workflow表单的作用是能够在客户端进行表单设计，然后在流程中动态开放哪些输入框可以供用户填写。
在这里我扩展了一个常用的WebEditor工具——KindEditor，能够插入自定义的html符号，如下图：
Form类如下：
1 public delegate string SetAutoCompleteValue(string autoCompleteType);
2
3 [Serializable]
4 public class Form
5 {
6 [XmlAttribute]
7 public Guid FormId { get; set; }
8 [XmlAttribute]
9 public string FormName { get; set; }
10 [XmlAttribute]
11 public string FormCategory { get; set; }
12 [XmlAttribute]
13 public string FormContent { get; set; }
14 [XmlAttribute]
15 public DateTime CreateDate { get; set; }
16 public Person Creator { get; set; }
17
18
19 public string CreaterName
20 {
21 get { return Creator != null ? Creator.PersonName : ""; }
22 }
23
24 public List<FormControl> FormControls { get; set; }
25
26 public void InitializeFormControls()
27 {
28 if (!string.IsNullOrEmpty(FormContent))
29 {
30 const string pattern = @"\<input(.*?)\/>";
31 var rx = new Regex(pattern);
32 var matches = rx.Matches(FormContent);
33 var formControls = new List<FormControl>();
34 foreach (Match match in matches)
35 {
36 string fieldLabel = Convert.ToString(match.Groups[0]); //Group[0] :[xx],Group[1]: xx
37 string[] para = fieldLabel.Split(‘ ‘);
38
39 var values = para.First(s => s.Trim().ToLower()
40 .StartsWith("value=")).Replace("value=", "").Replace("\"", "");
41
42 string[] sArray = Regex.Split(values, "//", RegexOptions.IgnoreCase);
43
44 bool isNewControl = true;
45 string controlId = string.Empty;
46 if (para.Any(p => p.StartsWith("id=")))
47 {
48 isNewControl = false;
49 controlId = para.First(s => s.Trim().ToLower()
50 .StartsWith("id=")).Replace("id=", "").Replace("\"", "");
51 }
52
53 if (sArray.Count() >= 3) //每个输入框表单至少要有三个以上属性
54 {
55 FormControl formControl ;
56 if (isNewControl)
57 {
58 switch (sArray[0])
59 {
60 case "单行":
61 formControl = new TextLineFormControl();
62 formControl.Width = int.Parse(sArray[2]);
63 break;
64 case "多行":
65 formControl = new MultiLineFormControl();
66 formControl.Width = int.Parse(sArray[2]);
67 formControl.Height = int.Parse(sArray[3]);
68 break;
69 case "单选":
70 formControl = new RadioFormControl();
71 formControl.InitialData = sArray[2];
72 break;
73 case "多选":
74 formControl = new CheckBoxFormControl();
75 formControl.InitialData = sArray[2];
76 break;
77 case "下拉":
78 formControl = new DropDownFormControl();
79 formControl.InitialData = sArray[2];
80 break;
81 case "自动":
82 formControl = new AutoCompleteFormControl();
83 formControl.InitialData = sArray[2];
84 break;
85 default:
86 formControl = new UnknowFormControl();
87 break;
88 }
89 formControl.FieldName = sArray[1];
90 formControl.ControlId = Guid.NewGuid();
91
92 }
93 else
94 {
95 formControl = FormControls.Single(f => f.ControlId == Guid.Parse(controlId));
96 switch (sArray[0])
97 {
98 case "单行":
99 formControl.Width = int.Parse(sArray[2]);
100 break;
101 case "多行":
102 formControl.Width = int.Parse(sArray[2]);
103 formControl.Height = int.Parse(sArray[3]);
104 break;
105 case "单选":
106 formControl.InitialData = sArray[2];
107 break;
108 case "多选":
109 formControl.InitialData = sArray[2];
110 break;
111 case "下拉":
112 formControl.InitialData = sArray[2];
113 break;
114 case "自动":
115 formControl.InitialData = sArray[2];
116 break;
117 default:
118 break;
119 }
120 }
121
122 formControls.Add(formControl);
123 FormContent = FormContent.Replace(match.Value,
124 string.Format("{{{0}}}", formControl.ControlId));
125 }
126
127 }
128 FormControls = formControls;
129 FormContent = FormContent;
130 }
131 }
132
133 public string GetOccupyContentString()
134 {
135 var str = FormContent;
136 foreach (var formControl in FormControls)
137 {
138 str = str.Replace(string.Format("{{{0}}}", formControl.ControlId), formControl.GetDesignString());
139 }
140 return str;
141 }
142
143 public string GetPreviewContentString()
144 {
145 var str = FormContent;
146
147 foreach (var formControl in FormControls)
148 {
149 str = str.Replace(string.Format("{{{0}}}", formControl.ControlId), formControl.GetInputString());
150 }
151 return str;
152 }
153
154 public string GetPreviewContentString(Dictionary<Guid, string> writedValues)
155 {
156 var str = FormContent;
157
158 foreach (var formControl in FormControls)
159 {
160 string value = null;
161 if (writedValues != null && writedValues.TryGetValue(formControl.ControlId, out value))
162 {
163 str = str.Replace(string.Format("{{{0}}}", formControl.ControlId), value);
164 }
165 else
166 {
167 str = str.Replace(string.Format("{{{0}}}", formControl.ControlId), string.Empty);
168 }
169 }
170 return str;
171 }
172
173 public string GetDisplayContent(List<Guid> canWriteformControlIds, SetAutoCompleteValue autoCompleteValue, Dictionary<Guid, string> writedValues = null)
174 {
175 var str = FormContent;
176
177 foreach (var formControl in FormControls)
178 {
179 if (canWriteformControlIds.Contains(formControl.ControlId))
180 {
181 string value = null;
182 if (writedValues != null && writedValues.TryGetValue(formControl.ControlId, out value))
183 {
184 formControl.FieldValue = value;
185 }
186 if (string.IsNullOrEmpty(value) && formControl is AutoCompleteFormControl &&
187 !string.IsNullOrEmpty(formControl.InitialData) && autoCompleteValue != null)
188 {
189 formControl.FieldValue = autoCompleteValue(formControl.InitialData);
190 }
191 str = str.Replace(string.Format("{{{0}}}", formControl.ControlId), formControl.GetInputString());
192 }
193 else
194 {
195 string value = string.Empty;
196 if (writedValues != null && writedValues.TryGetValue(formControl.ControlId, out value))
197 {
198 formControl.FieldValue = value;
199 }
200 str = str.Replace(string.Format("{{{0}}}", formControl.ControlId), value);
201 }
202 }
203 return str;
204 }
205 }
[Serializable]标识是为了能序列化类；
[XmlAttribute]是为了在持久化保存到数据库的时候使用XML特性，节约保存控件，便于查询操作。
InitializeFormControls：从编辑器中读入的代码进行初始化；
其它的方法基本用于前台呈现。
FormControl类如下：
基类：
1 [Serializable]
2 [XmlInclude(typeof(TextLineFormControl))]
3 [XmlInclude(typeof(MultiLineFormControl))]
4 [XmlInclude(typeof(RadioFormControl))]
5 [XmlInclude(typeof(CheckBoxFormControl))]
6 [XmlInclude(typeof(DropDownFormControl))]
7 [XmlInclude(typeof(AutoCompleteFormControl))]
8 [XmlInclude(typeof(UnknowFormControl))]
9 public abstract class FormControl
10 {
11 [XmlAttribute]
12 public Guid ControlId { get; set; }
13 [XmlAttribute]
14 public string FieldName { get; set; }
15 [XmlAttribute]
16 public string FieldValue { get; set; }
17 [XmlAttribute]
18 public int Width { get; set; }
19 [XmlAttribute]
20 public int Height { get; set; }
21 [XmlAttribute]
22 public string ToolTip { get; set; }
23 [XmlAttribute]
24 public bool Required { get; set; }
25 [XmlAttribute]
26 public bool CanWrite { get; set; }
27 [XmlAttribute]
28 public string InitialData { get; set; }
29 public abstract string GetDesignString();
30 public abstract string GetInputString();
31 }
[XmlInclude(typeof(TextLineFormControl))]..... 为了持久化时能够将派生类兼容存储；
GetDesignString：在设计器里呈现的方式；
GetInputString：在让用户输入时呈现的代码。
几个派生类：
1 [Serializable]
2 public class TextLineFormControl : FormControl
3 {
4 public override string GetDesignString()
5 {
6 return string.Format("<input type=\"text\" value=\"{0}//{1}//{2}\" style=\"{3}\" id=\"{4}\">",
7 WorkflowConstant.TextBoxFormControlName, FieldName, Width, WorkflowConstant.ControlDesignWidth,ControlId);
8 }
9
10 public override string GetInputString()
11 {
12 return string.Format("<input type=\"text\" value=\"{0}\" id=\"{1}\" size=\"{2}\" maxlength=\"{2}\" name=\"{1}\" >",
13 FieldValue, ControlId, Width);
14 }
15 }
16
17 [Serializable]
18 public class MultiLineFormControl : FormControl
19 {
20 public override string GetDesignString()
21 {
22 return string.Format("<input type=\"text\" value=\"{0}//{1}//{2}//{5}\" style=\"{3}\" id=\"{4}\">",
23 WorkflowConstant.TextAreaFormControlName, FieldName, Width, WorkflowConstant.ControlDesignWidth, ControlId, Height);
24 }
25
26 public override string GetInputString()
27 {
28 return string.Format("<textarea cols=\"{2}\" rows=\"{3}\" id=\"{1}\" name=\"{1}\" >{0}</textarea>",
29 FieldValue != null ? FieldValue.Replace("<br/>", "\n\r") : string.Empty, ControlId, Width, Height);
30 }
31 }
32
33 [Serializable]
34 public class RadioFormControl : FormControl
35 {
36 public override string GetDesignString()
37 {
38 return string.Format("<input type=\"text\" value=\"{0}//{1}//{2}\" style=\"{3}\" id=\"{4}\">",
39 WorkflowConstant.RadioFormControlName, FieldName, InitialData, WorkflowConstant.ControlDesignWidth, ControlId);
40 }
41
42 public override string GetInputString()
43 {
44 StringBuilder sb= new StringBuilder();
45 var data = InitialData.Split(‘|‘);
46 for (int i = 0; i < data.Length; i ++)
47 {
48 sb.AppendFormat("<input type=\"radio\" name=\"{0}\" id=\"{0}-{1}\" value=\"{2}\" {3}/>", ControlId, i,
49 data[i], FieldValue == data[i] ? " checked=\"checked\"" : string.Empty);
50 sb.AppendFormat("<label for=\"{0}-{1}\">{2}</label>", ControlId, i, data[i]);
51 }
52 return sb.ToString();
53 }
54 }
55 .........
Form类使用InitializeFormControls方法生成各种实例化控件，放在FormControls字段里。
这两个类使用的基本上是领域模型。
本系列导航：
- .net之工作流工程展示及代码分享（预告）
- .net之工作流工程展示及代码分享（一）工作流表单
- .net之工作流工程展示及代码分享（二）工作流引擎
- .net之工作流工程展示及代码分享（三）数据存储引擎
- .net之工作流工程展示及代码分享（四）与其他系统集成
时间： 2024-10-13 11:50:20