Question

我有一个非常简单（但很奇怪）的问题。我构建了一个简单的程序，它接收数据并将其存储在SQL数据库中。我的代码如下。我的表单上有一个列表框，向我显示我通过按钮添加的数据，即使在我关闭程序，重新启动计算机之后，这些数据仍然存在，等等。问题是，我不能（对于我的生活）找到这些数据的存储位置。我在数据库浏览器下检查了所有内容，并且没有任何新内容（除了我手动输入的3个原始内容）条目。有什么建议？

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

namespace Cookbook
{
public partial class frmMain : Form
{
    SqlConnection connection;
    string connectionString;

    public frmMain()
    {
        InitializeComponent();
        connectionString = ConfigurationManager.ConnectionStrings["Cookbook.Properties.Settings.CookbookConnectionString"].ConnectionString;
        PopulateRecipes();

    }

    private void PopulateRecipes()
    {
        using (connection = new SqlConnection(connectionString))
        using (SqlDataAdapter adapter = new SqlDataAdapter("SELECT * FROM Recipe", connection))
        {
            DataTable recipeTable = new DataTable();
            adapter.Fill(recipeTable);

            lstRecipes.DisplayMember = "Name";
            lstRecipes.ValueMember = "Id";
            lstRecipes.DataSource = recipeTable;
        }
    }

    private void PopulateIngredients()
    {
        string query = "SELECT a.Name FROM Ingredient a " + 
            "INNER JOIN RecipeIngredient b ON a.Id = b.IngredientId " + 
            "WHERE b.RecipeId = @RecipeId";

        using (connection = new SqlConnection(connectionString))
        using (SqlCommand command = new SqlCommand(query, connection))
        using (SqlDataAdapter adapter = new SqlDataAdapter(command))
        {
            command.Parameters.AddWithValue("@RecipeId", lstRecipes.SelectedValue);

            DataTable IngredientTable = new DataTable();
            adapter.Fill(IngredientTable);

            lstIngredients.DisplayMember = "Name";
            lstIngredients.ValueMember = "Id";
            lstIngredients.DataSource = IngredientTable;
        }

    }

    private void lstRecipes_SelectedIndexChanged(object sender, EventArgs e)
    {
        PopulateIngredients();
    }

    private void addbutton_Click(object sender, EventArgs e)
    {
        string query = "INSERT INTO Recipe VALUES (@RecipeName, 80, 'blah blah')";

        using (connection = new SqlConnection(connectionString))
        using (SqlCommand command = new SqlCommand(query, connection))

        {
            connection.Open();

            command.Parameters.AddWithValue("@RecipeName", comboBox1.Text);

            command.ExecuteScalar();

        }

        PopulateRecipes();
    }

    private void frmMain_Load(object sender, EventArgs e)
    {
        // TODO: This line of code loads data into the 'cookbookDataSet.RecipeIngredient' table. You can move, or remove it, as needed.
        this.recipeIngredientTableAdapter.Fill(this.cookbookDataSet.RecipeIngredient);
        // TODO: This line of code loads data into the 'cookbookDataSet.Recipe' table. You can move, or remove it, as needed.
        this.recipeTableAdapter.Fill(this.cookbookDataSet.Recipe);

    }

}
}

当我通过数据库浏览器查看时，我的“成分”表中只有生菜，番茄，奶酪 - ＆gt;显示表数据，但是当我查看表单中的数据时，它会显示我之前添加的所有数据。

我的SQL表单数据保存在哪里？

0 个答案: