在DataGridViewCell的显示用户控制 [英] Display user control in DatagridViewCell

问题描述

的WinForms .NET 3.5（C＃）

我有一个DataGridView（DGView）和我创建CustomColumn和CustomCell在DGView显示。我创建了我想在CustomCell显示一个CustomUserControl。

问题：我看不出在列的用户控件。我想我需要重写paint（）方法中CustomCell - 任何点，我该怎么办呢？

请注意 - 托管用户控件的MSDN例子是编辑单元格的值 - 在你做出你在哪里编辑单元用户控件可见权。我希望我的用户控件呈现为一个正常的WinForm控件。这个用户控件显示了该行的通知..并且每行可以有不同的通知。我希望用户能够点击的通知，并得到有关它的更多细节。 ..但现在我停留在我怎么显示该用户控件

任何指针将高度赞赏。

 公共类CustomColumn：的DataGridViewColumn {
公共CustomColumn（）：基地（新CustomeCell（））{} 
公共重写的DataGridViewCell CellTemplate 
 {
得到
 {
返回base.CellTemplate; 
} 
设置
 {
 //确保用于模板的细胞是CalendarCell。 
如果（值=空&放大器;！&安培;！
 value.GetType（）IsAssignableFrom（typeof运算（CustomeCell）））
 {
抛出新InvalidCastException的（这应该是自定义单元格）; 
} 
 base.CellTemplate =价值; 
} 
} 
} 
公共类CustomeCell：DataGridViewTextBoxCell 
 {
公共CustomeCell（）：基地（）{} 
公众覆盖类型值类型
 {
得到
 {
返回的typeof（CustomUserControl）; 
} 
} 
公众覆盖类型FormattedValueType 
 {
得到
 {
返回的typeof（CustomUserControl）; 
} 
} 
} 
  

解决方案

第一次尝试：我试着放在地方，我需要电网的用户控件。问题：滚动数据网格视图需要重新安排所有的用户控件。 结果 - 拒绝

第二个try ：我构建了一个用户控制它画在相应的单元格。 结果 - 工程至今

我只是推翻油漆和<$ C $。 C>的OnClick >在 CustomCell 类的DataGridViewCell

 公共类CustomeCell：DataGridViewCell的
 {
公众覆盖类型的ValueType 
 {
 {返回的typeof（ CustomUserControl）; } 
} 
 
保护覆盖无效油漆（图形图像，矩形clipBounds，矩形cellBounds，诠释的rowIndex，DataGridViewElementStates cellState，对象的值，对象FormattedValue的，串ERRORTEXT，的DataGridViewCellStyle cellStyle，DataGridViewAdvancedBorderStyle advancedBorderStyle，DataGridViewPaintParts paintParts）
 {
 VAR CTRL =（CustomUserControl）值; 
变种IMG =新位图（cellBounds.Width，cellBounds.Height）; 
 ctrl.DrawToBitmap（IMG，新的Rectangle（0，0，ctrl.Width，ctrl.Height））; 
 graphics.DrawImage（IMG，cellBounds.Location）; 
} 
 
保护覆盖无效的OnClick（DataGridViewCellEventArgs E）
 {
名单，LT;&遍历infoObject GT; OBJ文件= DataGridView.DataSource的名单，LT;遍历infoObject取代; 
如果（OBJ文件== NULL）
的回报; 
如果（e.RowIndex℃，|| e.RowIndex> = objs.Count）
的回报; 
 
 CustomUserControl CTRL = OBJ文件[e.RowIndex] .Ctrl; 
 //采取任何行动 - 我将只是改变颜色现在。 
 ctrl.BackColor = Color.Red; 
 ctrl.Refresh（）; 
 DataGridView.InvalidateCell（e.ColumnIndex，e.RowIndex）; 
} 
} 
  

的例子呈现 CustomControl 在 CustomCell CustomColumn 的）。当用户点击该单元格， CustomCell 的的OnClick 处理点击。理想情况下，我想委派点击自定义用户控件 CustomControl - 这应该处理该事件，如果它是一个点击本身（自定义用户控件可以在内部托管多个控制） - 因此它有点复杂那里。

 公共类CustomColumn：的DataGridViewColumn 
 {
公共CustomColumn（）：基地（新CustomeCell（）） {} 
 
公共重写的DataGridViewCell CellTemplate 
 {
 {返回base.CellTemplate; } 
组
 {
如果（值=空&放大器;！&安培;！value.GetType（）
 .IsAssignableFrom（typeof运算（CustomeCell）））
抛出新InvalidCastException的（这应该是一个自定义单元格）; 
 base.CellTemplate =价值; 
} 
} 
} 
  




Winforms .NET 3.5 (C#)

I have a DataGridView (DGView) and I created CustomColumn and CustomCell to be displayed in the DGView. I created a CustomUserControl which I want to display in the CustomCell.

Problem: I don't see the user control in the column. I think I need to override Paint() method in CustomCell - Any points how can I do that ?

Note - MSDN example of hosting user control is for editing the cell value - where you make your user control visible right where you are editing your cell. I want my user control to render as a normal winform control. This user control shows notifications for the row .. and each row can have different notifications. I want users to be able to click on notification and get more details about it. .. but for now I am stuck at "how do I display this user control"

Any pointers will be highly appreciated.

 public class CustomColumn : DataGridViewColumn {
    public CustomColumn() : base(new CustomeCell()) { }
    public override DataGridViewCell CellTemplate
    {
        get
        {
            return base.CellTemplate;
        }
        set
        {
            // Ensure that the cell used for the template is a CalendarCell.
            if (value != null &&
                !value.GetType().IsAssignableFrom(typeof(CustomeCell)))
            {
                throw new InvalidCastException("It should be a custom Cell");
            }
            base.CellTemplate = value;
        }
    }
}
public class CustomeCell : DataGridViewTextBoxCell
{
    public CustomeCell() : base() { }
    public override Type ValueType
    {
        get
        {
            return typeof(CustomUserControl);
        }
    }
    public override Type FormattedValueType
    {
        get
        {
            return typeof(CustomUserControl);
        }
    }
}

解决方案

First Try: I tried to place a user control on the grid where I needed. Problem: Scrolling the data grid view requires re arranging all those user controls. Result - Rejected.

Second Try: I constructed a user control and painted it in the appropriate cell. Result - works so far.

I just overrode Paint and OnClick methods of DataGridViewCell in the CustomCell class.

public class CustomeCell : DataGridViewCell
{
    public override Type ValueType
    {
        get { return typeof(CustomUserControl); } 
    }

    protected override void Paint(Graphics graphics, Rectangle clipBounds, Rectangle cellBounds, int rowIndex, DataGridViewElementStates cellState, object value, object formattedValue, string errorText, DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle advancedBorderStyle, DataGridViewPaintParts paintParts)
    {
        var ctrl = (CustomUserControl) value;
        var img = new Bitmap(cellBounds.Width, cellBounds.Height);
        ctrl.DrawToBitmap(img, new Rectangle(0, 0, ctrl.Width, ctrl.Height));
        graphics.DrawImage(img, cellBounds.Location);
    }

    protected override void OnClick(DataGridViewCellEventArgs e)
    {
        List<InfoObject> objs = DataGridView.DataSource as List<InfoObject>;
        if (objs == null)
            return;
        if (e.RowIndex < 0 || e.RowIndex >= objs.Count)
            return;

        CustomUserControl ctrl = objs[e.RowIndex].Ctrl;
        // Take any action - I will just change the color for now.
        ctrl.BackColor = Color.Red;
        ctrl.Refresh();
        DataGridView.InvalidateCell(e.ColumnIndex, e.RowIndex);
    }
}

The example renders the CustomControl in the CustomCell of CustomColumn ;). When user clicks on the cell, CustomCell's OnClick handles the click. Ideally, I would like to delegate that click to the custom user control CustomControl - which should handle the event as if it was a click on itself (custom user control can internally host multiple controls) - so its little complex there.

public class CustomColumn : DataGridViewColumn
{
    public CustomColumn() : base(new CustomeCell()) { }

    public override DataGridViewCell CellTemplate
    {
        get { return base.CellTemplate; }
        set
        {
            if (value != null && !value.GetType()
                .IsAssignableFrom(typeof (CustomeCell)))
                throw new InvalidCastException("It should be a custom Cell");
            base.CellTemplate = value;
        }
    }
}

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