自己写的一个分页控件(WinForm)

　　找来找去没找个轻量级的分页控件,只好自己写一个凑合着先用。先看效果图：

　　　　

　　控件的功能很简单，点击控件的几个按钮、捕获 Item_Click 事件、触发 PageIndexChanging 事件。

因此、必须要向此控件注册 PageIndexChanging 事件，在这个事件中,PageIndexChangingEventArgs 会传递新选择页的索引，根据这个索引值(NewPageIndex)就可以从数据库查询对应页的数据。

　　先初始化控件：

　　

     public void InitializingComponent()
        {
            firtItem = new ToolStripButton();
            firtItem.Image = CreateBitmap(FirstImage);
            firtItem.Name = "PageNavigatorMoveFirstItem";
            firtItem.ToolTipText = FirstTipText;

            previousItem = new ToolStripButton();
            previousItem.Image = CreateBitmap(PreviousImage);
            previousItem.Name = "PageNavigatorMovePreviousItem";
            previousItem.ToolTipText = PreviousTipText;

            nextItem = new ToolStripButton();
            nextItem.Image = CreateBitmap(NextImage);
            nextItem.Name = "PageNavigatorMoveNextItem";
            nextItem.ToolTipText = NextTipText;

            lastItem = new ToolStripButton();
            lastItem.Image = CreateBitmap(LastImage);
            lastItem.Name = "PageNavigatorMoveLastItem";
            lastItem.ToolTipText = LastTipText;

            textItem = new ToolStripTextBox();
            textItem.Name = "PageNavigatorTextItem";
            textItem.ToolTipText = ToolTipText;
            textItem.Size = new Size(45, 20);
            labelItemPrefix = new ToolStripLabel();
            labelItemPrefix.Text = "/";
            labelItemPrefix.Name = "PageNavigatorLabelPrefix";

            labelItem = new ToolStripLabel();
            labelItem.Text = this.pageIndex.ToString();
            labelItem.Name = "PageNavigatorLabelItem";
            labelItem.ToolTipText = LabelTipText;

            labelItemEnd = new ToolStripLabel();
            labelItemEnd.Text = " 页 ";
            labelItemEnd.Name = "PageNavigatorLabelEnd";

            queryItem = new ToolStripButton();
            queryItem.Image = CreateBitmap(QueryImage);
            queryItem.Name = "PageNavigatorQueryItem";
            queryItem.ToolTipText = QueryTipText;

            this.Items.AddRange(new ToolStripItem[] { firtItem, previousItem, nextItem, lastItem, textItem, labelItemPrefix, labelItem, labelItemEnd, queryItem });
        }

 

　　再看 Item_Click 事件:

　　

protected override void OnItemClicked(ToolStripItemClickedEventArgs e)
        {
            base.OnItemClicked(e);

            this.currentItem = e.ClickedItem;
            switch (e.ClickedItem.Name)
            {
                case "PageNavigatorMoveFirstItem":
                    if (PageIndex > 0)
                    {
                        pageIndex = 0;
                    }
                    break;
                case "PageNavigatorMovePreviousItem":
                    if (PageIndex > 0)
                    { pageIndex--; }
                    break;
                case "PageNavigatorMoveLastItem":
                    if (PageIndex < PageCount)
                    {
                        pageIndex = PageCount - 1;
                    }
                    break;
                case "PageNavigatorQueryItem":
                    ToolStripTextBox txt = this.Items["PageNavigatorTextItem"] as ToolStripTextBox;
                    if (txt != null)
                    {
                        if (!ValidateInput(txt.Text.Trim()))
                        {
                            MessageBox.Show("只能输入大于零的数字");
                            return;
                        }

                        int index = 0;
                        int.TryParse(txt.Text, out index);
                        index--;

                        if (0 <= index && index < PageCount)
                        {
                            pageIndex = index;
                        }
                        else
                        { MessageBox.Show("数字超出范围"); }
                    }
                    break;
                default:
                    if (PageIndex < PageCount)
                    {
                        pageIndex++;
                    }
                    break;
            }

            EnsureToolStripItemState(pageIndex);
　　　　　　//触发 PageIndexChanging 事件
            PageIndexChangingEventArgs ee = new PageIndexChangingEventArgs(pageIndex);
            OnPageIndexChanging(ee);
        }

　　最后 PageIndexChanging 事件：

    protected virtual void OnPageIndexChanging(PageIndexChangingEventArgs e)
        {
            var handler = Events[pageIndexChangingKey] as PageIndexChangingEventHandler;
            if (handler != null)
            { handler(this, e); }
        }

控件的主体程序就这么多。