在Windows窗体DataGridView单元中托管userControls [英] Host userControls in Windows Forms DataGridView Cells

问题描述

大家好！



所以我一直在尝试制作类似于

的自定义控件这个 [ ^ ]在某种意义上显示了自定义控件，但是这个用户控件不会完全显示因为它受到单元格边界的限制。



所以我所做的就是用VS创建一个新的usercontrol，然后在

Hi there everyone!

So I have been trying to make a custom control similar to
this[^] in the sense that instead a custom control is displayed, however this usercontrol will not show entirely since it is bounded by the cell boundaries.

So all i have done is create a new usercontrol with VS and then instead of a datetimepicker in

class CalendarEditingControl : DateTimePicker, IDataGridViewEditingControl
{
    DataGridView dataGridView;
    private bool valueChanged = false;
    int rowIndex;

    public CalendarEditingControl()
    {
        this.Format = DateTimePickerFormat.Short;
    }

    // Implements the IDataGridViewEditingControl.EditingControlFormattedValue 
    // property.
    public object EditingControlFormattedValue
    {
        get
        {
            return this.Value.ToShortDateString();
        }
        set
        {            
            if (value is String)
            {
                try
                {
                    // This will throw an exception of the string is 
                    // null, empty, or not in the format of a date.
                    this.Value = DateTime.Parse((String)value);
                }
                catch
                {
                    // In the case of an exception, just use the 
                    // default value so we're not left with a null
                    // value.
                    this.Value = DateTime.Now;
                }
            }
        }
    }

    // Implements the 
    // IDataGridViewEditingControl.GetEditingControlFormattedValue method.
    public object GetEditingControlFormattedValue(
        DataGridViewDataErrorContexts context)
    {
        return EditingControlFormattedValue;
    }

    // Implements the 
    // IDataGridViewEditingControl.ApplyCellStyleToEditingControl method.
    public void ApplyCellStyleToEditingControl(
        DataGridViewCellStyle dataGridViewCellStyle)
    {
        this.Font = dataGridViewCellStyle.Font;
        this.CalendarForeColor = dataGridViewCellStyle.ForeColor;
        this.CalendarMonthBackground = dataGridViewCellStyle.BackColor;
    }

    // Implements the IDataGridViewEditingControl.EditingControlRowIndex 
    // property.
    public int EditingControlRowIndex
    {
        get
        {
            return rowIndex;
        }
        set
        {
            rowIndex = value;
        }
    }

    // Implements the IDataGridViewEditingControl.EditingControlWantsInputKey 
    // method.
    public bool EditingControlWantsInputKey(
        Keys key, bool dataGridViewWantsInputKey)
    {
        // Let the DateTimePicker handle the keys listed.
        switch (key & Keys.KeyCode)
        {
            case Keys.Left:
            case Keys.Up:
            case Keys.Down:
            case Keys.Right:
            case Keys.Home:
            case Keys.End:
            case Keys.PageDown:
            case Keys.PageUp:
                return true;
            default:
                return !dataGridViewWantsInputKey;
        }
    }

    // Implements the IDataGridViewEditingControl.PrepareEditingControlForEdit 
    // method.
    public void PrepareEditingControlForEdit(bool selectAll)
    {
        // No preparation needs to be done.
    }

    // Implements the IDataGridViewEditingControl
    // .RepositionEditingControlOnValueChange property.
    public bool RepositionEditingControlOnValueChange
    {
        get
        {
            return false;
        }
    }

    // Implements the IDataGridViewEditingControl
    // .EditingControlDataGridView property.
    public DataGridView EditingControlDataGridView
    {
        get
        {
            return dataGridView;
        }
        set
        {
            dataGridView = value;
        }
    }

    // Implements the IDataGridViewEditingControl
    // .EditingControlValueChanged property.
    public bool EditingControlValueChanged
    {
        get
        {
            return valueChanged;
        }
        set
        {
            valueChanged = value;
        }
    }

    // Implements the IDataGridViewEditingControl
    // .EditingPanelCursor property.
    public Cursor EditingPanelCursor
    {
        get
        {
            return base.Cursor;
        }
    }

    protected override void OnValueChanged(EventArgs eventargs)
    {
        // Notify the DataGridView that the contents of the cell
        // have changed.
        valueChanged = true;
        this.EditingControlDataGridView.NotifyCurrentCellDirty(true);
        base.OnValueChanged(eventargs);
    }
}

我插入了自己的用户控件，但是这个控件总是受到单元边界的限制，所以我的问题是：如何让usercontrol出现在类似于datetimepicker行为的单元格旁边？



谢谢

I have inserted my own usercontrol, however this control is always bounded by the cell boundaries, so my question is: how can I get the usercontrol to appear next to the cell similar to the behavior of the datetimepicker?

Thanks

推荐答案

通过覆盖以下内容解决;

Solved by overriding the following;

public override void PositionEditingControl(bool setLocation, bool setSize, Rectangle cellBounds, Rectangle cellClip, DataGridViewCellStyle cellStyle, bool singleVerticalBorderAdded, bool singleHorizontalBorderAdded, bool isFirstDisplayedColumn, bool isFirstDisplayedRow)

有了这个，您可以将控件放在任何位置，并设置其边界大小以适应您的控制。

With this you can position the control wherever you like and set its boundary size to accommodate your control.

这篇关于在Windows窗体DataGridView单元中托管userControls的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！