c# - 使用数据集填充 dataGridView

Question

我正在尝试创建一个食谱数据库，该数据库从用户那里获取配料并输出包含所述配料的食谱。我试图用 sql 语句的结果填充数据 GridView ，但在我的网格中没有得到任何结果。我的 SQL 语句是正确的。这是我的代码:

结果窗口:

        private void resultsWindow_Load(object sender, EventArgs e)
    {
        //get connection string
        string connectionString = Properties.Settings.Default.ConnectionString;

        DataSet recipeDataSet = new DataSet();
        conn = new DatabaseConnections(connectionString);

        //Get dataset
        recipeDataSet = conn.getRecipes(ingredientArray);

        //Display data in grid view
        recipesDataGrid.DataSource = recipeDataSet.Tables[0];
    }

数据库连接窗口:

        public DataSet getRecipes(string[] ingArray)
    {
        string sqlString = "SELECT recipes.Name, Instructions, recipes.Preperation_Time, Author FROM RecipeIngredients" +
                           " INNER JOIN recipes ON recipes.Recipe_ID = RecipeIngredients.Recipe_ID" +
                           " INNER JOIN Ingredients ON Ingredients.Ingredient_ID = RecipeIngredients.Ingredient_ID" +
                           " WHERE ingredients.Name = 'Eggs'";

        DataSet recipeDataSet = new DataSet();
        DataTable recipeDataTable = new DataTable();

        openConnection();

        dataAdapter = new SqlDataAdapter(sqlString, connectionToDB);

        //Fill dataset
        dataAdapter.Fill(recipeDataTable);
        recipeDataSet.Tables.Add(recipeDataTable);
        dataAdapter.Fill(recipeDataSet);

        closeConnection();

        return recipeDataSet;

    }

This is the data grid once I run the program

提前致谢。

编辑: 我意识到不是我的数据表/数据集不起作用，而是我的 SQL 语句似乎没有返回任何内容，即使当我将它作为一个单独的查询时我得到了结果。

Answer 1

试试吧..我不确定

 private void resultsWindow_Load(object sender, EventArgs e)
    {
        //gets connection string
        string connectionString = Properties.Settings.Default.ConnectionString;

        DataSet recipeDataSet = new DataSet();
        conn = new DatabaseConnections(connectionString);

        //Gets dataset
        Datatable dt1 = conn.getRecipes(ingredientArray);

        //Displays data in grid view
    recipesDataGrid.DataSource = dt1.DefaultView;


    }


   public DataTable getRecipes(string[] ingArray)
{
    string sqlString = "SELECT recipes.Name, Instructions, recipes.Preperation_Time, Author FROM RecipeIngredients" +
                       " INNER JOIN recipes ON recipes.Recipe_ID = RecipeIngredients.Recipe_ID" +
                       " INNER JOIN Ingredients ON Ingredients.Ingredient_ID = RecipeIngredients.Ingredient_ID" +
                       " WHERE ingredients.Name = 'Eggs'";

    DataTable recipeDataTable = new DataTable();

    openConnection();

    dataAdapter = new SqlDataAdapter(sqlString, connectionToDB);

    //Fills dataset
    dataAdapter.Fill(recipeDataTable);
    closeConnection();

    return recipeDataTable;