通过ComponentOne给Spread提供丰富的CellType类型

Spread 中给用户提供了自定义CellType的接口，用户可以定义自己所需要的单元格类型，以实现快捷的数据编辑操作和丰富的数据展示形式，不过 .NET 中提供的标准控件很有限，只能实现一些基本的功能。本文就结合 ComponentOne 所提供的功能强大的 WinForms 控件来实现更多类型的自定义单元格类型。

Spread for WinForms 在浏览状态时可以控件单元格的水平对齐和垂直对齐方式，不过在进入编辑状态时，垂直对齐方式将失效，我们就结合 C1TextBox for WinForms 控件来实现编辑状态时的垂直居中功能。

首先，需要你安装 ComponentOne Studio for WinForms 产品，下载地址：http://www.grapecity.com.cn/developer/c1_winforms_overview.htm

以下是自定义单元格类型的完整代码：

    public class CTextCellType : FarPoint.Win.Spread.CellType.TextCellType
    {
        C1.Win.C1Input.C1TextBox txt = null;

        public CTextCellType()
        {
            txt = new C1.Win.C1Input.C1TextBox();
            txt.VerticalAlign = C1.Win.C1Input.VerticalAlignEnum.Middle;
            txt.TextAlign = HorizontalAlignment.Center;
            txt.Multiline = true;
            txt.WordWrap = true;
            txt.LostFocus += new EventHandler(txt_LostFocus);
        }

        void txt_LostFocus(object sender, EventArgs e)
        {
            C1.Win.C1Input.C1TextBox txt = sender as C1.Win.C1Input.C1TextBox;
            FarPoint.Win.Spread.FpSpread spread = txt.Parent as FarPoint.Win.Spread.FpSpread;
            spread.ActiveSheet.ActiveCell.Value = txt.Text;
        }

        public override Control GetEditorControl(Control parent, FarPoint.Win.Spread.Appearance appearance, float zoomFactor)
        {
            return txt;
        }

        public override object GetEditorValue()
        {
            return txt.Text;
        }

        public override void SetEditorValue(object value)
        {
            txt.Value = value;
        }
    }

使用自定义CellType：

    private void Form1_Load(object sender, EventArgs e)
    {
        CTextCellType txt = new CTextCellType();
        txt.Multiline = true;
        txt.WordWrap = true;
        fpSpread1.ActiveSheet.Columns[0].CellType = txt;
        fpSpread1.ActiveSheet.Columns[0].VerticalAlignment = FarPoint.Win.Spread.CellVerticalAlignment.Center;
        fpSpread1.ActiveSheet.Columns[0].HorizontalAlignment = FarPoint.Win.Spread.CellHorizontalAlignment.Center;
    }

源码下载：

 7659_VCenter.zip (10.37 kb)

运行截图：