有一个 gridView 和Items to buy。
Group
- Checkbox|Item Description
每个组最多可以购买的物品。
当达到最大值时（每组），我想更改所有未选择行的外观。
例子：
从每个组中选择 1 个项目
第 1 组
第 2 组
选择后
第 1 组
第 2 组
检查每个组的最大项目数量后，我想更改其余项目的外观。
我有第一列的组摘要。我的问题是我不知道如何触发所有单元格的外观变化。在每个单元格离开事件中计算所选项目是否正确，或者是否有更好的方法来完成此操作？
我用 GridControl 创建了 Devexpress 模板。Person 类是为我创建的。我为这个例子做了一点改变。
public class Person {
public Person(string firstName, string secondName) {
this.FirstName = firstName;
this.SecondName = secondName;
this.Comments = String.Empty;
}
public Person(string firstName, string secondName, string comments)
: this(firstName, secondName) {
this.Comments = comments;
}
public bool Selected
{
get;
set;
}
public bool Blocked
{
get;
set;
}
public string FirstName
{
get;
set;
}
public string SecondName
{
get;
set;
}
public string Comments
{
get;
set;
}
}
我的网格如下所示：
我用代码实现了你的功能：
public partial class Form1 : XtraForm
{
int max = 2;
public Form1()
{
InitializeComponent();
InitGrid();
}
List<Person> gridDataList = new List<Person>();
void InitGrid()
{
gridDataList.Add(new Person("John", "Smith"));
gridDataList.Add(new Person("Gabriel", "Smith"));
gridDataList.Add(new Person("Ashley", "Smith", "some comment"));
gridDataList.Add(new Person("Adrian", "Smith", "some comment"));
gridDataList.Add(new Person("Gabriella", "Smith", "some comment"));
gridDataList.Add(new Person("John", "Forester"));
gridDataList.Add(new Person("Gabriel", "Forester"));
gridDataList.Add(new Person("Ashley", "Forester", "some comment"));
gridDataList.Add(new Person("Adrian", "Forester", "some comment"));
gridDataList.Add(new Person("Gabriella", "Forester", "some comment"));
bindingSource1.DataSource = gridDataList;
}
private void gridView1_CellValueChanged(object sender, DevExpress.XtraGrid.Views.Base.CellValueChangedEventArgs e)
{
int parentHandle = gridView1.GetParentRowHandle(e.RowHandle);
int count = gridView1.GetChildRowCount(parentHandle);
int childHandle = -1;
int nCount = 0;
for (int i = 0; i < count; i++)
{
childHandle = gridView1.GetChildRowHandle(parentHandle, i);
Person p = gridView1.GetRow(childHandle) as Person;
if (p != null)
{
p.Blocked = false;
if (p.Selected)
{
nCount++;
}
}
}
if (nCount == max)
{
for (int i = 0; i < count; i++)
{
childHandle = gridView1.GetChildRowHandle(parentHandle, i);
Person p = gridView1.GetRow(childHandle) as Person;
if (p != null && !p.Selected)
{
p.Blocked = true;
}
}
}
// to redraw grid
gridView1.RefreshData();
}
private void richedSelected_EditValueChanged(object sender, EventArgs e)
{
gridView1.PostEditor();
}
private void gridView1_CustomDrawCell(object sender, DevExpress.XtraGrid.Views.Base.RowCellCustomDrawEventArgs e)
{
Person p = gridView1.GetRow(e.RowHandle) as Person;
if (p != null && p.Blocked)
{
e.Appearance.ForeColor = Color.White;
}
}
private void richedSelected_EditValueChanging(object sender, DevExpress.XtraEditors.Controls.ChangingEventArgs e)
{
Person p = gridView1.GetRow(gridView1.FocusedRowHandle) as Person;
if (p != null && p.Blocked)
{
e.Cancel = true;
}
}
}
这当然是简化的实现。只是为了让你走上正轨。
设计师的元素：
private DevExpress.XtraGrid.GridControl gridControl;
private DevExpress.XtraGrid.Views.Grid.GridView gridView1;
private System.Windows.Forms.BindingSource bindingSource1;
private DevExpress.XtraGrid.Columns.GridColumn colFirstName;
private DevExpress.XtraGrid.Columns.GridColumn colSecondName;
private DevExpress.XtraGrid.Columns.GridColumn colComments;
private DevExpress.XtraGrid.Columns.GridColumn colSelected;
private DevExpress.XtraEditors.Repository.RepositoryItemCheckEdit richedSelected;
如果您找到任何更好的解决方案，请告诉我。
这是我需要链接的示例