手把手教你如何擴充GridView之個性分頁

實現思路和上文的Excel和Word導出是一樣的，就是在GridView中添加行，首先聲明以下控件，用於顯示頁次：第幾頁，共多少頁，多少記錄，首頁，上一頁，下一頁，尾頁用於分頁的控件
Label lblCurrentPage;
Label lblPageCount;
Label lblRowsCount;
LinkBut​​ton btnFirst;
LinkBut​​ton btnPrev;
LinkBut​​ton btnNext;
LinkBut​​ton btnLast;在GridView的OnInit方法中，初始化這些控制項在控制項的Oninit方法初始化分頁控件
protected override void OnInit(EventArgs e)
{
this.EnableViewState = true;

lblCurrentPage = new Label();
lblCurrentPage.ForeColor = ColorTranslator.FromHtml("#e78a29");
lblCurrentPage.Text = "1";

lblPageCount = new Label();
lblPageCount.Text = "1";

lblRowsCount = new Label();
lblRowsCount.ForeColor = ColorTranslator.FromHtml("#e78a29");

btnFirst = new LinkBut​​ton();
btnFirst.Text = "首頁";
btnFirst.Command += new CommandEventHandler(NavigateToPage);
btnFirst.CommandName = "Pager";
btnFirst.CommandArgument = "First";

btnPrev = new LinkBut​​ton();
btnPrev.Text = "上一頁";
btnPrev.Command += new CommandEventHandler(NavigateToPage);
btnPrev.CommandName = "Pager";
btnPrev.CommandArgument = "Prev";

btnNext = new LinkBut​​ton();
btnNext.Text = "下一頁";
btnNext.Command += new CommandEventHandler(NavigateToPage);
btnNext.CommandName = "Pager";
btnNext.CommandArgument = "Next";

btnLast = new LinkBut​​ton();
btnLast.Text = "尾頁";
btnLast.Command += new CommandEventHandler(NavigateToPage);
btnLast.CommandName = "Pager";
btnLast.CommandArgument = "Last";

base.OnInit(e);
}

然後是關鍵部分的程式碼，就是將這些控制項如何加入到GridView中，透過在建立子控制項的方式，如下：
在建立子控制項的方法中加入分頁控制項
protected override int CreateChildControls(System.Collections.IEnumerable dataSource, bool dataBinding)
{
int res = base.CreateChildControls(dataSource, dataBinding);
if (ShowToolBar)
{
try
{
GridViewRow row = new GridViewRow(0, 0, DataControlRowType.Pager, DataControlRowState.Normal);
TableCell c = new TableCell();
c.Width = Unit.Percentage(100);
c.ColumnSpan = this.Columns.Count;
row.Cells.Add(c);
TableCell cell1 = new TableCell();
Table table = new Table();
TableRow r = new TableRow();
table.Rows.Add(r);
table.Width = Unit.Percentage(100);
c.Controls.Add(table);
r.Cells.Add(cell1);
Literal l1 = new Literal();
l1.Text = "頁次：";
cell1.Controls.Add(l1);
cell1.Wrap = false;
cell1.Controls.Add(lblCurrentPage);
l1 = new Literal();
l1.Text = "頁/";
cell1.Controls.Add(l1);
cell1.Controls.Add(lblPageCount);
l1 = new Literal();
l1.Text = "頁，共";
cell1.Controls.Add(l1);
cell1.Controls.Add(lblRowsCount);
l1 = new Literal();
l1.Text = "筆記錄";
cell1.Horizo​​ntalAlign = Horizo​​​​ntalAlign.Left;
cell1.Controls.Add(l1);
TableCell cell2 = new TableCell();
cell2.Horizo​​ntalAlign = Horizo​​​​ntalAlign.Right;
cell2.Wrap = false;

l1 = new Literal();
l1.Text = " [";
cell2.Controls.Add(l1);
cell2.Controls.Add(btnFirst);
l1 = new Literal();
l1.Text = "] ";
cell2.Controls.Add(l1);

l1 = new Literal();
l1.Text = " [";
cell2.Controls.Add(l1);
cell2.Controls.Add(btnPrev);
l1 = new Literal();
l1.Text = "] ";
cell2.Controls.Add(l1);

l1 = new Literal();
l1.Text = " [";
cell2.Controls.Add(l1);
cell2.Controls.Add(btnNext);
l1 = new Literal();
l1.Text = "] ";
cell2.Controls.Add(l1);

l1 = new Literal();
l1.Text = " [";
cell2.Controls.Add(l1);
cell2.Controls.Add(btnLast);
l1 = new Literal();
l1.Text = "] ";
cell2.Controls.Add(l1);
r.Cells.Add(cell2);
this.Controls[0].Controls.AddAt(0, row);
}
catch
{
}
}
return res;
}下面就是處理分頁的事件，類似RowCommand
public void NavigateToPage(object sender, CommandEventArgs e)
{
btnFirst.Enabled = true;
btnPrev.Enabled = true;
btnNext.Enabled = true;
btnLast.Enabled = true;
switch (e.CommandArgument.ToString())
{
case "Prev":
if (this.PageIndex > 0)
{
this.PageIndex -= 1;

}
break;
case "Next":
if (this.PageIndex < (this.PageCount - 1))
{
this.PageIndex += 1;

}
break;
case "First":
this.PageIndex = 0;
break;
case "Last":
this.PageIndex = this.PageCount - 1;
break;
}
if (this.PageIndex == 0)
{
btnFirst.Enabled = false;
btnPrev.Enabled = false;
if (this.PageCount == 1)
{
btnLast.Enabled = false;
btnNext.Enabled = false;
}
}
else if (this.PageIndex == this.PageCount - 1)
{
btnLast.Enabled = false;
btnNext.Enabled = false;
}
OnBind();
}這樣就輕易的實現了一個個性的分頁，歡迎各位大蝦拍磚。