插入、更新、删除不适用于 Windows Mobile 的 SQL Server CE 数据库文件 [英] Insert, Update, Delete are not applied on SQL Server CE database file for Windows Mobile
问题描述
我正在使用 Visual Studio 2008 使用 C# 开发 Windows Mobile 6.5 应用程序,它连接到 SQL Server CE 数据库.
I am developing a Windows Mobile 6.5 application with C# using Visual Studio 2008, it's connected to a SQL Server CE database.
我用这段代码插入行,每一列的值与一个textBox字符串相关:
I used this code to insert rows, the value of each column is related to a textBox string :
namespace GesTPL
{
public partial class Form4 : Form
{
public Form4()
{
InitializeComponent();
}
public Form RefToForm1 { get; set; }
static String pathDir = System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase);
static String pathDB = System.IO.Path.Combine(pathDir, "releve.sdf");
static String connectionString = string.Format(@"DataSource={0}", pathDB);
SqlCeConnection connection = new SqlCeConnection(connectionString);
private void Form4_Load(object sender, EventArgs e)
{
connection.Open();
}
private void button_Fermer_Click_1(object sender, EventArgs e)
{
this.RefToForm1.Show();
this.Close();
}
private void button_OK_Click_1(object sender, EventArgs e)
{
if (textBox1.Text == "" || textBox2.Text == "" || textBox3.Text == "" || textBox5.Text == "")
{
MessageBox.Show("Fill in all the information first!");
}
else
{
SqlCeCommand cmd = new SqlCeCommand("INSERT INTO compteur(numeroCompteur, idGeographique, abonne, police) VALUES(@numeroCompteur, @idGeographique, @abonne, @police)", connection);
cmd.Connection = connection;
cmd.Parameters.AddWithValue("@numeroCompteur", textBox1.Text);
cmd.Parameters.AddWithValue("@idGeographique", textBox2.Text);
cmd.Parameters.AddWithValue("@abonne", textBox3.Text);
cmd.Parameters.AddWithValue("@police", textBox5.Text);
try
{
int affectedrows = cmd.ExecuteNonQuery();
if (affectedrows > 0)
{
MessageBox.Show("Data added successfully!");
}
else
{
MessageBox.Show("Failed to add data!");
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
}
}
}
问题是修改仅适用于模拟器中的数据库,而不适用于我的项目中的数据库 .sdf
文件.
The problem is that the modifications are only applied on the database in the emulator, but not on the database .sdf
file I have in my project.
推荐答案
选择项目中的 releve.sdf
数据库文件,转到 Properties 部分,然后使确定 Build Action = Content
和 Copy to Output Directory = Copy if newer
.
Select the releve.sdf
database file in your project, go to the Properties section, and make sure Build Action = Content
and Copy to Output Directory = Copy if newer
.
这应该就是您所需要的,但如果还有其他问题,您可能需要仔细检查文件位置:
That should be all you need, but if there are other issues you may want to double check the file location:
private void button_OK_Click_1(object sender, EventArgs e)
{
MessageBox.Show(pathDB, "Check Path Location!");
// ... rest of your code
}
这篇关于插入、更新、删除不适用于 Windows Mobile 的 SQL Server CE 数据库文件的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!