做一个简单WPF连接数据库的
控件类型和名称：
DataGrid：dataGrid
Button1 ：Button1
Button ：Button2
TextBox ：txtuserName
在引用App.config写数据库的连接字符串
|
1
2
3
4
5
6
7
8
9
10
|
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
</startup>
<appSettings>
<!--数据库连接字符串-->
<add key ="ConnString" value ="Data Source=.;initial Catalog=educ; user=sa; Password=123456;Pooling=true" />
</appSettings>
</configuration>
|
<add key ="ConnString" value ="Data Source=.;initial Catalog=educ; user=sa; Password=123456;Pooling=true" />
Data Source=.表示本机，可以写ip地址 initial Catalog=数据库名 user=用户名 Password=密码;写一个DataBaseHelper的数据库类
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
namespace _03连接数据库
{
class DataBaseHelper
{
/// 数据库打开连接的方法
///
/// </summary>
/// <returns></returns>
public static SqlConnection getSqlConnection()
{
SqlConnection sqlConnection = new SqlConnection();
try
{
//获取数据库字符串
sqlConnection.ConnectionString = System.Configuration.ConfigurationSettings.AppSettings["ConnString"];
sqlConnection.Open();
sqlConnection.Close();
}
catch
{
throw new Exception("无法连接数据库服务器");
}
return sqlConnection;
}
/// sql增删改的方法
///
/// </summary>
/// <param name="sqlstr"></param>
/// <returns></returns>
public static int GetNonQueryEffect(string sqlstr)
{
SqlConnection sqlConnection = new SqlConnection();
try
{
sqlConnection.Open();
//创建要执行的语句
SqlCommand cmd = new SqlCommand(sqlstr, sqlConnection);
return cmd.ExecuteNonQuery();//返回执行语句中的错误
}
catch (Exception ex)
{
throw new Exception(ex.ToString());
}
finally
{
sqlConnection.Close();
sqlConnection.Dispose();//释放资源
}
}
/// 读取数据的的方法
///
/// </summary>
/// <param name="sqlstr"></param>
/// <returns></returns>
public static DataSet GetDataset(string sqlstr)
{
SqlConnection conn = getSqlConnection();
try
{
conn.Open();//打开数据库连接
SqlDataAdapter sda = new SqlDataAdapter(sqlstr ,conn );//更新数据库的命令
DataSet ds = new DataSet();
sda.Fill(ds);//填充
return ds;
}
catch (Exception ex)
{
throw new Exception(ex.ToString ());
}
finally
{
conn.Close();
conn.Dispose();
}
}
}
}
|
按键的代码
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
|
private void Button_Click_1(object sender, RoutedEventArgs e)
{
string str = "select *FROM student";//查询的语句
dataGrid.ItemsSource = DataBaseHelper.GetDataset(str).Tables[0].DefaultView;
}
private void Button_Click_2(object sender, RoutedEventArgs e)
{
if (txtuserName.Text.Trim()== " ")
{
return;
}
string strr = string.Format("select *FROM student where sname='{0}'", txtuserName.Text);
dataGrid.ItemsSource = DataBaseHelper.GetDataset(strr).Tables[0].DefaultView;
}
|
以上这篇WPF简单的数据库查询实例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持服务器之家。
原文链接：http://www.cnblogs.com/enduo/p/7793907.html