private void dataGridViewProperty_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
if (this._updateSelectedObject == false)
{
return;
}
if (this.propertyGridDataGridView.SelectedObjectSeting)
{
return;
}
//更新子行的值是,这个事件会触发两次,并不是一次父行一次子行触发
//而是在通知父行在更新值是,父行会自动更新其下子行,就又一次进来
//更新子行时子行去更新父行,不会使父行进入这个事件
//为了避免子行两次进来,增加一个valueChanging属性
//首先判断是否是一个实现了IPropertyGirdCell接口的属性编辑单元格
IPropertyGirdCell iPropertyGirdCell = this.propertyGridDataGridView[e.ColumnIndex, e.RowIndex] as IPropertyGirdCell;
if (iPropertyGirdCell == null)
{
return;
}
PropertyGridRow propertyGirdRow = this.propertyGridDataGridView.Rows[e.RowIndex] as PropertyGridRow;
//如果是自己引发的更新
if (propertyGirdRow.ValueChangingBySelf)
{
return;
}
//如果当前行是子行,设置ValueChangingBySelf=true,表示接下来由于 UpdateSelectedObject 再次进入的这个事件
//是自己引发的
//保证PropertyChanged委托只调用一次
if (propertyGirdRow.ParentRow != null)
{
propertyGirdRow.ValueChangingBySelf = true;
}
propertyGirdRow.ContrastDefaultValue();
propertyGirdRow.UpdateSelectedObject();
//调用属性已更改事件
if (this.PropertyChanged != null)
{
PropertyChangeEventArgs eventArgs = new PropertyChangeEventArgs(this.SelectedObjects, propertyGirdRow);
PropertyChanged(sender, eventArgs);
Debug.WriteLine("PropertyChanged > CellValueChanged : " + propertyGirdRow.PropertyName);
}
propertyGirdRow.ValueChangingBySelf = false;
}
/// <summary>
/// 从PropertyGirdCell中取出旧值
/// </summary>
/// <returns></returns>
public object GetPropertyOldValue()
{
IPropertyGirdCell iPropertyGirdCell = this._propertyGridCell as IPropertyGirdCell;
if (iPropertyGirdCell == null)
{
throw new NotImplementedException();
}
return(iPropertyGirdCell.GetPropertyOldValue());
}
/// <summary>
/// 向属性行设置一个值
/// 仅在初始化属性行时调用，用于初始化属性行上的属性(Property)值
/// </summary>
/// <param name="value"></param>
public void SetPropertyValue(object value)
{
//注意
//进这个方法时，该行还没有被加到DataGridView中，此时还在行初始化阶段
//所以在这里调用任何和DataGridView有关的方法都是无效的
IPropertyGirdCell iPropertyGirdCell = this._propertyGridCell as IPropertyGirdCell;
if (iPropertyGirdCell == null)
{
throw new NotImplementedException();
}
iPropertyGirdCell.SetPropertyValue(value);
//如果属性值是null,把可能包含的子属性行去掉
if (value == null)
{
#region 移除可能存在的子属性行
//移除可能存在的子属性行
if (this.SubRows != null && this.DataGridView != null)
{
IsCollapse = true;
}
this.SubRows = null;
#endregion
}
else
{
#region 判断是否需要添加子属性行
//判断是否需要添加子属性行
//因为可能子属性行之前因为value为null被清掉了,在重新设置不为null的值后,还要再把它们加载进来
if (this.SubRows == null)
{
InitSubRow();
}
#endregion
}
if (this.Index > -1)
{
this.DataGridView.InvalidateRow(this.Index);
}
//处理此属性行可能包含的子属性行
if (this.SubRows != null)
{
foreach (PropertyGridRow row in this.SubRows)
{
row.UpdateProperty();
}
}
//如此当前行是一个子属性行,需要通知它的父行重绘,以显示新的属性值
//但是注意可能这些行还没有被加载到DataGridView中
if (this.ParentRow != null && this.DataGridView != null)
{
this.DataGridView.InvalidateRow(this.ParentRow.Index);
}
}
/// <summary>
/// 构造,应使用此构造,将SelectedObject的初始化留在后面处理,因为要兼容多对象同时选中
/// </summary>
/// <param name="attribute"></param>
/// <param name="propertyInfoName"></param>
public PropertyGridRow(PropertyRelatorAttribute attribute, PropertyInfo propertyInfo, PropertyGridPad propertyGrid)
{
this._propertyRelatorAttribute = attribute;
this._propertyInfo = propertyInfo;
this._propertyGrid = propertyGrid;
#region 初始化单元格
DataGridViewCell dcPropertyName = new DataGridViewTextBoxCell();
dcPropertyName.Value = attribute.PropertyDisplayName;
this.Cells.Add(dcPropertyName);
DataGridViewCell dcDescription = new DataGridViewTextBoxCell();
dcDescription.Value = attribute.Description;
this.Cells.Add(dcDescription);
#region 初始化用于编辑属性值的单元格
//获取PropertyEditorAttribute
PropertyEditorAttribute[] editorAttribute =
(PropertyEditorAttribute[])propertyInfo.GetCustomAttributes(typeof(PropertyEditorAttribute), true);
if (editorAttribute == null || editorAttribute.Length == 0)
{
//没有加PropertyEditorAttribute的Attribute，分配一个默认的文本框做为编辑控件
//TODO:分配一个默认的文本框做为编辑控件
}
else
{
//创建属性(Property)单元格
_propertyGridCell = CellFactory.Instance.Create(editorAttribute[0]) as DataGridViewCell;
//TODO:这里要考虑没有创建出合适的cell的情况，既_propertyGridCell为null的情况
_iPropertyGirdCell = _propertyGridCell as IPropertyGirdCell;
_iPropertyGirdCell.PropertyRelatorAttribute = attribute;
//查找并设置（如果有）DefaultValueAttribute
DefaultValueAttribute[] defaultValueAttribute =
(DefaultValueAttribute[])propertyInfo.GetCustomAttributes(typeof(DefaultValueAttribute), true);
if (defaultValueAttribute != null && defaultValueAttribute.Length > 0)
{
_iPropertyGirdCell.DefaultValueAttribute = defaultValueAttribute[0];
}
//查找并设置（如果有）PropertyEditorAttribute
if (editorAttribute != null && editorAttribute.Length > 0)
{
_iPropertyGirdCell.PropertyEditorAttribute = editorAttribute[0];
}
}
_iPropertyGirdCell.Owner = this._propertyGrid;
_iPropertyGirdCell.OwnerRow = this;
_propertyGridCell.Style.BackColor = Color.White;
_propertyGridCell.Style.ForeColor = Color.Black;
_propertyGridCell.Style.SelectionBackColor = Color.White;
_propertyGridCell.Style.SelectionForeColor = Color.Black;
this.Cells.Add(_propertyGridCell);
#endregion
DataGridViewCell dcProperty = new DataGridViewTextBoxCell(); //属性的真实名
dcProperty.Value = propertyInfo.Name;
this.Cells.Add(dcProperty);
#endregion
//此处的只读设置是享有最高优先级的
this.ReadOnly = attribute.ReadOnly;
//初始化子属性行
InitSubRow();
}
