コード例 #1
0
 /// <summary>
 /// Determine if it is okay to change this.DataSource, and if it is okay
 /// and the current record has unsaved changed then save that record.
 /// Is not okay if the current record is invalid.
 /// </summary>
 /// <returns></returns>
 public bool IsOkayToChangeDataSource(string operation)
 {
     if (mCurrentEntity != null)
     {
         if (mCurrentEntity.IsDirty)
         {
             ErrorList errors = new ErrorList();
             SetCurrentFixedValuesAndValidate(errors);
             if (errors.MaxSeverity > ErrorSeverity.Warning)
             {
                 ErrorDisplayForm.Show(errors);
                 // Ask if want to discard changes.
                 string msg = string.Format("If you {1} you will lose " +
                                            "edits to the current {0}. Do you wish to {1}?",
                                            DataSource.EntityDisplayName, operation);
                 DialogResult result = MessageBox.Show(msg, "Close Form", MessageBoxButtons.YesNo);
                 if (result != DialogResult.Yes)
                 {
                     return(false);
                 }
             }
             else
             {
                 // Save without asking.
                 DataSource.Save(CurrentEntity);
             }
         }
     }
     return(true);
 }
コード例 #2
0
 /// <summary>
 /// Validate and persist the current entity when the form closes.
 /// Cannot persist an invalid entity, so asks the user whether they
 /// want to close form if the current entity is invalid. This is the
 /// only place this class performs validation.
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void FormClosingHandler(object sender, FormClosingEventArgs e)
 {
     if (mCurrentEntity != null)
     {
         if (mCurrentEntity.IsDirty)
         {
             ErrorList errors = new ErrorList();
             SetCurrentFixedValuesAndValidate(errors);
             if (errors.MaxSeverity > ErrorSeverity.Warning)
             {
                 // Validation errors may be displayed before this event fires
                 // in some scenarios (e.g. DataGridView.RowValidating event).
                 if (ShowErrorsInFormClosing)
                 {
                     ErrorDisplayForm.Show(errors);
                 }
                 // Ask if want to discard changes.
                 string msg = string.Format("If you close the form you will lose " +
                                            "edits to the current {0}. Do you wish to close the form?",
                                            DataSource.EntityDisplayName);
                 DialogResult result = MessageBox.Show(msg, "Close Form", MessageBoxButtons.YesNo);
                 // NOTE: Empirically, on entry c.Cancel==true if there was a validation
                 // error in RowValidating, and c.Cancel==false if not. This suggests that
                 // DataGridView adds its own FormClosing event handler and prevents the
                 // form from closing if there is a validation error.
                 e.Cancel = (result != DialogResult.Yes);
             }
             else
             {
                 // Save without asking.
                 DataSource.Save(CurrentEntity);
             }
         }
     }
 }
コード例 #3
0
        /// <summary>
        /// Used by subclasses to validate the current entity if there is one,
        /// and show errors if any found.
        /// </summary>
        /// <returns></returns>
        public bool CurrentEntityIsValid()
        {
            EndEdit();
            ErrorList errors = new ErrorList();

            if (mCurrentEntity != null)
            {
                SetCurrentFixedValuesAndValidate(errors);
                if (errors.MaxSeverity > ErrorSeverity.Warning)
                {
                    ErrorDisplayForm.Show(errors);
                    return(false);
                }
            }
            return(true);
        }
コード例 #4
0
        private void RowDeletingHandler(object sender, DataGridViewRowCancelEventArgs e)
        {
            EndEdit();
            ErrorList errors = new ErrorList();

            if (CurrentEntity != null && CurrentEntity.IsPersisted)
            {
                ValidateDeleting(errors);
                if (errors.MaxSeverity > ErrorSeverity.Warning)
                {
                    ErrorDisplayForm.Show(errors);
                    e.Cancel = true;
                    return;
                }
                DialogResult dlgRes = MessageBox.Show("Are you sure you want to delete this row?",
                                                      "Confirm Delete", MessageBoxButtons.OKCancel, MessageBoxIcon.Question);
                if (dlgRes != DialogResult.OK)
                {
                    e.Cancel = true;
                    return;
                }
            }
        }
コード例 #5
0
        public static void Show(ErrorList errors)
        {
            ErrorDisplayForm frm = new ErrorDisplayForm();

            frm.ShowInternal(errors);
        }