基于C#开发数据库应用程序
一、思路
1.窗体上使用DataGridView控件来实现对数据库表格内容的显示
2.绑定数据源到DataGridView控件（应用程序连接到数据库）
3.在应用程序上实现对数据库文件的增、删、改、查
二、界面
三、实现过程
1.绑定数据源到DataGridView控件（应用程序连接到数据库）
方法引用：
1 private void Form1_Load(object sender, EventArgs e)
2 {
3 //Binding Mode Get DataSource to DataGridView
4 dataGridView1.DataSource = BindingMode_BindingSource("Hyson_Staff", "Table_Staff_Info").Tables[0];
5
6 //dataGridView1.DataSource = NonBindingMode_BindingSource();
7 }
方法实现：
1 /// <summary>
2 /// 绑定模式下获取数据源
3 /// </summary>
4 /// <param name="DB_Name">数据库名称</param>
5 /// <param name="Table_Name">表格名称</param>
6 /// <returns>返回类型为DataSet</returns>
7 private DataSet BindingMode_BindingSource(string DB_Name, string Table_Name)
8 {
9 string constr = @"Server=DESKTOP-K1D8VOK\HYSON_STOCK_V01;user=sa;pwd=sa;database=" + DB_Name;
10 SqlConnection mycon = new SqlConnection(constr);
11 DataSet myds = new DataSet();
12 try
13 {
14 mycon.Open();
15 string sql = "select * from " + Table_Name;
16 SqlDataAdapter myda = new SqlDataAdapter(sql, mycon);
17 myda.Fill(myds, "Table_Staff_Info");
18 }
19 catch (Exception ex)
20 {
21 MessageBox.Show(ex.Message);
22 }
23 finally
24 {
25 mycon.Close();
26 }
27 return myds;
28 }
2.实现数据库的新增记录
方法引用：
InsertDB( "Hyson_Staff","Table_Staff_Info",
new string[]{"Name","Gender","Department","BrithDay","JoinTime", "LeaveTime","IsWork"},
new string[]{ textBox_Name.Text,
textBox_Gender.Text,
textBox_Department.Text,
textBox_BrithDay.Text,
textBox_JoinTime.Text,
textBox_LeaveTime.Text,
checkBox_IsWork.Checked.ToString()});
dataGridView1.DataSource = BindingMode_BindingSource("Hyson_Staff", "Table_Staff_Info").Tables[0];
方法实现：
1 /// <summary>
2 /// 向数据库中增加数据
3 /// </summary>
4 /// <param name="DB_Name">数据库名称</param>
5 /// <param name="Table_Name">表名</param>
6 /// <param name="Array_Keys">Key数组</param>
7 /// <param name="Array_Vaules">Value数组</param>
8 private void InsertDB(string DB_Name, string Table_Name, string[] Array_Keys, string[] Array_Vaules)
9 {
10 string constr = @"Server=DESKTOP-K1D8VOK\HYSON_STOCK_V01;user=sa;pwd=sa;database=" + DB_Name;
11 SqlConnection mycon = new SqlConnection(constr);
12
13 try
14 {
15 mycon.Open();
16 string keys = " (";
17 for (int i = 0; i < Array_Keys.Length; i++)
18 {
19 if (i<=Array_Keys.Length-2)
20 {
21 keys = keys + "[" + Array_Keys[i].Trim() + "],";
22 }
23 else
24 {
25 keys = keys + "[" + Array_Keys[i].Trim() + "])";
26 }
27 }
28
29 string values="";
30 for (int i = 0; i < Array_Vaules.Length; i++)
31 {
32 if (i <= Array_Vaules.Length - 2)
33 {
34 values = values + "‘" + Array_Vaules[i].Trim() + "‘,";
35 }
36 else
37 {
38 values = values + "‘" + Array_Vaules[i].Trim() + "‘";
39 }
40 }
41
42 string update_sql = "insert into [" + Table_Name + "] "+keys + "values(" + values + ")";
43 SqlCommand mycom = new SqlCommand(update_sql, mycon);
44 mycom.ExecuteNonQuery();
45 }
46 catch (Exception ex)
47 {
48 MessageBox.Show(ex.Message);
49 }
50 finally
51 {
52 mycon.Close();
53 }
54 }
3.实现数据库的删除记录
方法引用：
DeleteDB("Hyson_Staff", "Table_Staff_Info", label_ID.Text);
方法实现：
1 /// <summary>
2 /// 实现数据库的删除记录
3 /// </summary>
4 /// <param name="DB_Name">数据库名称</param>
5 /// <param name="Table_Name">表名</param>
6 /// <param name="id">主键（数字主键ID）</param>
7 private void DeleteDB(string DB_Name, string Table_Name,string id)
8 {
9 string constr = @"Server=DESKTOP-K1D8VOK\HYSON_STOCK_V01;user=sa;pwd=sa;database=" + DB_Name;
10 SqlConnection mycon = new SqlConnection(constr);
11
12 try
13 {
14 mycon.Open();
15 string delete_sql = "delete top(1) from " + Table_Name + " where id=" + id;
16 SqlCommand mycom = new SqlCommand(delete_sql, mycon);
17 mycom.ExecuteNonQuery();
18 }
19 catch (Exception ex)
20 {
21 MessageBox.Show(ex.Message);
22 }
23 finally
24 {
25 mycon.Close();
26 }
27 }
4.实现数据库的修改记录
方法引用：
1 string ID = (label_ID.Text);
2 UpdateDB("Hyson_Staff", "Table_Staff_Info", "Name", textBox_Name.Text, ID);
3 UpdateDB("Hyson_Staff", "Table_Staff_Info", "Gender", textBox_Gender.Text, ID);
4 UpdateDB("Hyson_Staff", "Table_Staff_Info", "Department", textBox_Department.Text, ID);
5 UpdateDB("Hyson_Staff", "Table_Staff_Info", "BrithDay", textBox_BrithDay.Text, ID);
6 UpdateDB("Hyson_Staff", "Table_Staff_Info", "JoinTime", textBox_JoinTime.Text, ID);
7 UpdateDB("Hyson_Staff", "Table_Staff_Info", "LeaveTime", textBox_LeaveTime.Text, ID);
8 UpdateDB("Hyson_Staff", "Table_Staff_Info", "IsWork", checkBox_IsWork.Checked.ToString(), ID);
方法实现：
1 /// <summary>
2 /// 修改数据库数据
3 /// </summary>
4 /// <param name="DB_Name">数据库名称</param>
5 /// <param name="Table_Name">表名</param>
6 /// <param name="Key">待修改键</param>
7 /// <param name="NewValue">数值</param>
8 /// <param name="Update_ID">当前记录的主键</param>
9 private void UpdateDB(string DB_Name, string Table_Name, string Key, string NewValue, string Update_ID)
10 {
11 string constr = @"Server=DESKTOP-K1D8VOK\HYSON_STOCK_V01;user=sa;pwd=sa;database=" + DB_Name;
12 SqlConnection mycon = new SqlConnection(constr);
13
14 try
15 {
16 mycon.Open();
17 string update_sql = "update " + Table_Name + " set " + Key + "=‘" + NewValue + "‘ where id=" + Update_ID;
18 SqlCommand mycom = new SqlCommand(update_sql, mycon);
19 mycom.ExecuteNonQuery();
20 }
21 catch (Exception ex)
22 {
23 MessageBox.Show(ex.Message);
24 }
25 finally
26 {
27 mycon.Close();
28 }
29 }
5.实现数据库的修改记录
方法引用：（将查询到的内容，填充到dataGridView1中）
dataGridView1.DataSource = SelectDB("Hyson_Staff", "Table_Staff_Info", comboBox_SelectKey.Text, comboBox_Relationship.Text,comboBox_SelectValue.Text).Tables[0];
方法实现：
1 /// <summary>
2 /// 基于Select..Where..的数据库查询
3 /// </summary>
4 /// <param name="DB_Name">数据库名</param>
5 /// <param name="Table_Name">表名</param>
6 /// <param name="SelectKey">待查询的键</param>
7 /// <param name="Relationship">关系（大于，小于，等于）</param>
8 /// <param name="SelectValue">待查询的值</param>
9 /// <returns>返回类型DataSet</returns>
10 private DataSet SelectDB(string DB_Name, string Table_Name,string SelectKey,string Relationship,string SelectValue)
11 {
12 string constr = @"Server=DESKTOP-K1D8VOK\HYSON_STOCK_V01;user=sa;pwd=sa;database=" + DB_Name;
13 //string constr = @"Server=192.168.10.123;user=sa;pwd=sa;database=" + DB_Name;
14 SqlConnection mycon = new SqlConnection(constr);
15 DataSet myds = new DataSet();
16
17 try
18 {
19 mycon.Open();
20 string sql = "select * from " + Table_Name + " where (" + SelectKey + Relationship+"‘" + SelectValue + "‘)";
21 SqlDataAdapter myda = new SqlDataAdapter(sql, mycon);
22 myda.Fill(myds, "Table_Staff_Info");
23 }
24 catch (Exception ex)
25 {
26 MessageBox.Show(ex.Message);
27 }
28 finally
29 {
30 mycon.Close();
31 }
32 return myds;
33 }
原文地址：https://www.cnblogs.com/LynnXue/p/12028284.html
时间： 2024-10-10 13:18:57