毕业设计结束了，在设计工程中的一些难点记录下来，以供日后查阅。此次毕业设计winform应用程序。为了在开发过程中提高开发的效率，特此设立了几个工具类。
一、数据库中表字段自动生成实体类
在数据库中进行表结构设计之后，为此生成实体类，代码如下。
/// <summary>
/// 用于从数据库中生成实体类
/// </summary>
public class ProduceEntity
{
private string tableName;
public ProduceEntity(string tableName)
{
this.tableName = tableName;
}
// string strconn = ConfigurationManager.ConnectionStrings["myConnection"].ConnectionString;
string strconn = string.Format(@"Data Source=(local);Initial Catalog=GraduationProject;User ID=sa;Password=123");
public void StartProduceEntity()
{
// string tableName = "QCZZ";
List<string> ZD = new List<string>();
List<string> type = new List<string>();
string sql=string.Format("SELECT a.name,b.name FROM syscolumns a left JOIN systypes b on a.xusertype=b.xusertype WHERE a.id=OBJECT_ID(‘{0}‘)",tableName);
//using ()
//{
SqlConnection conn = new SqlConnection(strconn);
SqlCommand cmd = new SqlCommand(sql,conn);
try
{
conn.Open();
SqlDataReader reader = cmd.ExecuteReader();
if (reader.HasRows)
{
while (reader.Read())
{
ZD.Add(reader[0].ToString());
type.Add(reader[1].ToString());
}
}
ProcessProduceEntity(ZD, type,tableName);
}
catch (Exception e2)
{
}
finally
{
conn.Close();
}
}
// }
private void ProcessProduceEntity(List<string> ZD, List<string> type,string tableName)
{
//string path = string.Format(@"F:\资料\net\C#\Demo\毕业设计\Model\{0}.cs",tableName);
string path = string.Format(@"F:\学习资料\毕业设计\Model\{0}.cs", tableName);
FileStream fs = new FileStream(path,FileMode.Create);
StreamWriter sw = new StreamWriter(fs);
StringBuilder sb = new StringBuilder();
sb.Append("using System;\r\n using System.Collections.Generic;\r\n using System.Text;\r\n");
sb.Append("namespace Model\r\n{\r\n");
sb.AppendFormat("public class {0}\r\n", tableName);
sb.Append("{\r\n");
string DataType=string.Empty;
for(int i=0;i<ZD.Count;i++)
{
if(type[i].ToLower()=="varchar")
{
DataType = "string";
//sb.AppendFormat("public string {0}\r\n", ZD[i].ToUpper());
}
else if (type[i].ToLower() == "datetime")
{
DataType = "DateTime";
//sb.AppendFormat("public DateTime {0}\r\n", ZD[i].ToUpper());
}
else if (type[i].ToLower() == "int32")
{
DataType = "int";
}
sb.AppendFormat("public {0} {1}\r\n", DataType,ZD[i]);
sb.Append("{ \r\n");
sb.Append("set;get;\r\n");
sb.Append("}\r\n");
}
sb.Append("}\r\n");
sb.Append("}\r\n");
#region TRY
try
{
sw.Write(sb.ToString());
}
catch (Exception E2)
{
}
finally
{
sw.Close();
fs.Close();
}
#endregion
}
}
此次代码设计的比较仓促，还存在少许的bug。以后使用时要改正。
二、form表单的数据自动加载到实体类中
适用于的场景如下表单上一些textbox、RichTextBox等的值自动加载到实体类中，避免了一一的赋值，提高了开发效率。使用前的规则：表单控件的Name属性必须与实体类中的字段的名称保持一致。代码如下所示：
1 /// <summary>
2 /// 表单数据生成实体类
3 /// </summary>
4 class FormDataToObject
5 {
6 private List<Control> list = new List<Control>();
7 /// <summary>
8 /// 卡片类,
9 /// </summary>
10 /// <param name="obj"></param>
11 /// <param name="form"></param>
12 /// <returns></returns>
13 public object FormDataToEntity(object obj,Control form)
14 {
15 try
16 {
17 this.GetControls(form);
18 Type Type = obj.GetType();
19
20 PropertyInfo[] infos = Type.GetProperties();
21 //for (int i = 0; i < form.Controls.Count; i++)
22 foreach (Control control in list)
23 {
24 foreach (PropertyInfo info in infos)
25 {
26 if (info.Name == control.Name)
27 {
28 if (typeof(TextBox) == control.GetType())
29 {
30 info.SetValue(obj, ((TextBox)control).Text, null);
31 }
32 else if (typeof(RadioButton) == control.GetType())
33 {
34 RadioButton rb = (RadioButton)control;
35 if (rb.Checked)
36 {
37 info.SetValue(obj, true, null);
38 }
39 else
40 {
41 info.SetValue(obj, false, null);
42 }
43 }
44 else if (typeof(DateTimePicker) == control.GetType())
45 {
46 DateTimePicker dtp = (DateTimePicker)control;
47 DateTime dt = dtp.Value;
48 //int dd = dt.Day;
49 info.SetValue(obj, dt, null);
50 }
51 else if (typeof(ComboBox) == control.GetType())
52 {
53 ComboBox cbm = (ComboBox)control;
54 info.SetValue(obj, cbm.Text, null);
55 }
56 else if (typeof(RichTextBox) == control.GetType())
57 {
58 RichTextBox rtb = (RichTextBox)control;
59 info.SetValue(obj, rtb.Text, null);
60 }
61 else if (typeof(NumericUpDown) == control.GetType())
62 {
63 NumericUpDown num = (NumericUpDown)control;
64 info.SetValue(obj, num.Value, null);
65 }
66 else if (typeof(CheckBox) == control.GetType())
67 {
68 CheckBox cb = control as CheckBox;
69 if (cb.Checked == true)
70 {
71 info.SetValue(obj, true, null);
72 }
73 }
74
75 }
76
77 }
78 }
79 }
80 catch (Exception e)
81 {
82 MessageBox.Show(e.Message);
83 }
84 return obj;
85 }
86 /// <summary>
87 /// 列表类（不支持批量）
88 /// </summary>
89 /// <param name="obj">实体类</param>
90 /// <param name="dataGridView">DataGridVIew的对象</param>
91 /// <returns></returns>
92 public object FormDataToEntityList(object obj, Control dataGridView)
93 {
94 //this.GetControls(form);
95 Type Type = obj.GetType();
96
97 PropertyInfo[] infos = Type.GetProperties();
98
99 if (dataGridView.GetType() == typeof(DataGridView))
100 {
101 DataGridView dgv= dataGridView as DataGridView;
102 foreach(DataGridViewRow row in dgv.Rows )
103 foreach(DataGridViewColumn column in dgv.Columns)
104 foreach (PropertyInfo info in infos)
105 {
106 if (info.PropertyType.Name.ToLower() == "int32")
107 {
108 if (info.Name == column.Name)
109 {
110 int value = Convert.ToInt32(row.Cells[column.Name].Value);
111 info.SetValue(obj, value, null);
112
113 }
114 }
115 else
116 {
117 if (info.Name == column.Name)
118 {
119 info.SetValue(obj, row.Cells[column.Name].Value, null);
120
121 }
122 }
123
124 }
125 }
126
127 return obj;
128 }
129
130 private void GetControls(Control Parent)
131 {
132 foreach (Control c in Parent.Controls)
133 {
134 list.Add(c);
135 if (c.Controls.Count > 0)
136 {
137 GetControls(c);
138 }
139
140 }
141 //return list;
142 }
143 }
设计思路：1.通过递归方法获取表单上的全部控件。
2.通过反射来获取实体类中的字段信息（Type Type = obj.GetType();PropertyInfo[] infos = Type.GetProperties();）
3通过控制实体类中字段与表单控件Name属性是否一致来进行赋值。
三、实体类中的数据自动展现在form表单控件上
适用于的场景如下实体类中字段的数值自动加载到表单上一些textbox、RichTextBox等中，避免了一一的赋值，提高了开发效率。使用前的规则：表单控件的Name属性必须与实体类中的字段的名称保持一致。代码如下所示：
1 /// <summary>
2 /// 转换器，从实体类向表单数据
3 /// </summary>
4 class EntityToFormData
5 {
6 #region 用于将实体类中的数据装换到表单卡片上
7 private static List<Control> list = new List<Control>();
8 public static void ConvertEntityToForm(object obj,Control form)
9 {
10 Type type = obj.GetType();
11 PropertyInfo[] infos=type.GetProperties();
12 GetAllControl(form);
13 foreach (Control c in list)
14 {
15 foreach (PropertyInfo info in infos)
16 {
17 if(c.GetType()==typeof(TextBox)
18 || c.GetType() == typeof(RichTextBox))
19 if (c.Name == info.Name)
20 {
21 c.Text = info.GetValue(obj, null).ToString();
22 }
23 if (c.GetType() == typeof(CheckBox))
24 if (c.Name == info.Name)
25 {
26 bool flag = Convert.ToBoolean(info.GetValue(obj, null));
27 (c as CheckBox).Checked = flag;
28 }
29 if(c.GetType()==typeof(NumericUpDown))
30 {
31 if (c.Name == info.Name)
32 {
33 decimal b = Convert.ToDecimal(info.GetValue(obj, null));
34 (c as NumericUpDown).Value = b;
35 }
36 }
37 }
38 }
39 }
40 //用于获取表单上的所有控件aa
41 private static void GetAllControl(Control control)
42 {
43 foreach(Control c in control.Controls)
44 {
45 list.Add(c);
46 if (c.Controls.Count > 0)
47 {
48 GetAllControl(c);
49 }
50
51
52 }
53 }
54 #endregion
55
56 #region 用于将实体类中的数据转换到表单列表上
57 /// <summary>
58 ///
59 /// </summary>
60 /// <param name="obj">实体类</param>
61 /// <param name="dgv">列表DataGridView实例</param>
62 public static void ConvertEntityToFormList(object obj, DataGridView dgv)
63 {
64 Type type = obj.GetType();
65 PropertyInfo[] infos = type.GetProperties();
66 int index = dgv.Rows.Add();
67 foreach (DataGridViewColumn column in dgv.Columns)
68 foreach (PropertyInfo info in infos)
69 {
70
71 if (info.Name == column.Name)
72 {
73 dgv.Rows[index].Cells[column.Name].Value = info.GetValue(obj, null);
74 }
75 }
76 dgv.Rows[index].Tag = obj;
77 }
78 #endregion
79 }
时间： 2024-11-08 23:55:07