一个程序在我的计算机上工作正常但是当我用另一个用荷兰语Windows发送它时,它有DateTimePicker的问题

Question

该程序使用C#WinForms和SQL Server 2008.当我想输入包含DateTimePicker值的数据时,我可以看到措辞是荷兰语,然后我得到一个关于转换值的错误.有什么方法可以预编程来解决这个问题吗？我抓住了错误,就在这里.

        try
        {
            SqlConnection connect = new SqlConnection("Data Source=Localhost\\SQLExpress;Initial Catalog=DataBase;Integrated Security=True");
            SqlDataAdapter da = new SqlDataAdapter();

            /******************** Inserting ********************/
            string query = "INSERT INTO spending VALUES (";
            query += "'" + date_dateTimePicker.Value + "', "; // Date
            query += "'" + Convert.ToDecimal(amount_spent_textBox.Text) + "', "; // Amount spent
            query += "'" + spent_on_textBox.Text + "')"; // Spent on
            connect.Open();
            da.InsertCommand = new SqlCommand(query, connect);
            da.InsertCommand.ExecuteNonQuery();

            connect.Close();
        }

        catch (Exception error)
        {
            MessageBox.Show(error.ToString());
        }

事情变得越来越厚..我在尝试将dateTimePicker值插入数据库时​​遇到此错误,就像我使用上面的代码一样.它在我的电脑上运行得非常好,但在这里不起作用.谁能解释一下？这是错误:

使用的代码:

string update = "UPDATE table SET the_date = '" + the_date_dateTimePicker.Value + "' WHERE instance_ID = 1";
        connect.Open();
        da.InsertCommand = new SqlCommand(update, connect);
        da.InsertCommand.ExecuteNonQuery();
        connect.Close();

好的,这是我正在处理的表单的完整代码,显示此错误的表单.大多数表单的结构都是这样的,所以如果我把它弄好,那么其余表格应该没有任何问题.我正在我的计算机上测试它,所以如果它在这里工作它也应该在那里工作.

看一看,我不知道该怎么做了.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;

namespace TheNamespace
{
public partial class submit_spending : Form
{
    public submit_spending()
    {
        InitializeComponent();
    }

    private void submit_button_Click(object sender, EventArgs e)
    {
        try
        {
            SqlConnection connect = new SqlConnection("Data Source=Localhost\\SQLExpress;Initial Catalog=TheDataBase;Integrated Security=True");
            SqlDataAdapter da = new SqlDataAdapter();

            /******************** Inserting ********************/
            string query = "INSERT INTO spending VALUES (@date, @amount_spent, @spent_on)";
            SqlCommand command = new SqlCommand(query);
            command.Parameters.AddWithValue("date", date_dateTimePicker.Value);
            command.Parameters.AddWithValue("amount_spent", Convert.ToDecimal(amount_spent_textBox.Text));
            command.Parameters.AddWithValue("spent_on", spent_on_textBox.Text);

            connect.Open();
            da.InsertCommand = new SqlCommand(query, connect);
            da.InsertCommand.ExecuteNonQuery();
            connect.Close();

            if (MessageBox.Show("Submitted.", "Spending submitted", MessageBoxButtons.OK) == DialogResult.OK)
            {
                this.Close();
            }
        }
        catch (Exception error)
        {
            MessageBox.Show(error.ToString());
        }
    }

    private void cancel_button_Click(object sender, EventArgs e)
    {
        this.Close();
    }
}
}

Answer 1

你应该使用这种Parameters.AddWithValue()方法.我希望它能DateTime正确格式化.

string cmdText = "UPDATE table SET colX = @value WHERE id = @currId";
var cmd = new SqlCommand(cmdText, conn);
cmd.Parameters.AddWithValue("value", dateTimePicker1.Value);
cmd.Parameters.AddWithValue("currId", id);