DataGridView不显示列/数据

我正在尝试将一些数据加载到DataGridView中，但是DataGridView没有显示数据（即使它在调试模式中说它有项目）

protected void PopulateGrid() { string dataSource = "test.db"; String connectionString = "Data Source=" + dataSource; String selectCommand = "SELECT * FROM test_run"; SQLiteDataAdapter dataAdapter = new SQLiteDataAdapter(selectCommand, connectionString); DataSet ds = new DataSet(); dataAdapter.Fill(ds); dataGridView1.DataSource = ds; dataGridView1.Refresh(); } 

或者它不起作用并出现错误：“datareader已在此命令上处于活动状态”

  protected void PopulateGrid() { SQLiteConnection SQLconnect = new SQLiteConnection(); SQLiteCommand SQLcommand = default(SQLiteCommand); SQLiteDataAdapter SQLAdapt = new SQLiteDataAdapter(); SQLiteDataReader SQLreader = default(SQLiteDataReader); DataTable db = new DataTable(); SQLconnect.ConnectionString = "Data Source=test.db;MultipleActiveResultSets=True"; SQLconnect.Open(); SQLcommand = SQLconnect.CreateCommand(); SQLcommand.CommandText = "SELECT * FROM test_run;"; SQLreader = SQLcommand.ExecuteReader(); SQLAdapt.SelectCommand = SQLcommand; SQLAdapt.Fill(db); dataGridView1.DataSource = db.DataSet; dataGridView1.Refresh(); 

Answer 1

 dataGridView1.DataSource = ds; dataGridView1.DataMember = ds.Tables[0].TableName; //or if you want to use DataTable as DataSource for your grid dataGridView1.DataSource = ds.Tables[0];