public async Task LoadAsync(StudentEvaluationArgs args)
{
ViewModelArgs = args ?? StudentEvaluationArgs.CreateDefault();
try
{
if (String.IsNullOrWhiteSpace(ViewModelArgs.StudentId) || String.IsNullOrWhiteSpace(ViewModelArgs.TeacherId))
{
Item = null;
IsEditMode = false;
}
else
{
var item = await StudentEvaluationService.GetStudentEvaluationAsync(ViewModelArgs.TeacherId, ViewModelArgs.StudentId);
Item = item ?? new StudentEvaluationModel {
StudentId = ViewModelArgs.StudentId, TeacherId = ViewModelArgs.TeacherId, IsEmpty = true
};
if (item == null)
{
IsEditMode = true;
}
else
{
IsEditMode = false;
}
}
}
catch (Exception ex)
{
await DialogService.ShowAsync("载入失败", ex.Message);
}
}
protected async override Task <bool> DeleteItemAsync(StudentEvaluationModel model)
{
try
{
return(await StudentEvaluationService.DeleteStudentEvaluationAsync(model) > 0);
}
catch (Exception e)
{
await DialogService.ShowAsync("删除失败", e.InnerException?.Message ?? e.Message);
}
return(false);
}
protected override async Task <bool> SaveItemAsync(StudentEvaluationModel model)
{
try
{
return(await StudentEvaluationService.AddOrUpdateStudentEvaluationAsync(model) > 0);
}
catch (Exception e)
{
await DialogService.ShowAsync("保存失败", e.InnerException?.Message ?? e.Message);
}
return(false);
}