因此,在WindowsForm中,我有2个ComboBoxes
和一个CheckedListBox
用于练习。当您选择字体效果(健美操,重量,有氧运动等)和肌肉小组(三头肌,胸部,背部,前臂等)时,您应该从CheckedListBox
中脱离练习。
两个 ComboBoxes'
默认值都是1,因此它应该在 CheckedListBox
中显示俯卧撑,因为 TypeFitness
= 1是钙质, MuscleGroup
= 1是前肩。
相反,它显示了 System.Data.DataRowView
,但是第二次我以表格显示正确的形式选择健美操。有没有办法做到这一点,因此立即显示练习?
( System.Data.DataRowView
仅显示上一个选择没有结果的何时)
代码:
private void Exercises()
{
string query = "SELECT X.ExerciseId, X.Naam FROM Xercises AS X " +
"INNER JOIN MG_Exercise AS MGX ON MGX.ExerciseId = X.ExerciseId " +
"WHERE MGX.MuscleId = @MuscleId AND X.FitnessId = @FitnessId";
using (connection = new SqlConnection(connectionString))
using (SqlCommand command = new SqlCommand(query, connection))
using (SqlDataAdapter adapter = new SqlDataAdapter(command))
{
SqlParameter param = command.Parameters.AddWithValue("@MuscleId", comBoxMuscleGroup.SelectedValue);
SqlParameter param2 = command.Parameters.AddWithValue("@FitnessId", comBoxTypeFitness.SelectedValue);
if(param.Value == null)
{
param.Value = DBNull.Value;
}
if(param2.Value == null)
{
param2.Value = DBNull.Value;
}
DataTable Xdata = new DataTable();
adapter.Fill(Xdata);
clbXcercises.DisplayMember = "Naam";
clbXcercises.ValueMember = "X.ExerciseId";
clbXcercises.DataSource = Xdata;
}
}
问题是我将DataSource
放置上次Exercises()
。所以应该是:
clbXcercises.DataSource = Xdata;
clbXcercises.DisplayMember = "Naam";
clbXcercises.ValueMember = "X.ExerciseId";