asp.net中使用自定义控件的方式实现一个分页控件(3)

namespace CustomControl
{
public delegate void PageOnEventHandler(object sender, EventArgs args);
[DefaultProperty("PageSize")]
[ToolboxData("<{0}:PageOn runat=server Width=100%></{0}:PageOn>")]
public class PageOn :CompositeControl
{
#region
Label lblMessage;
LinkButton btnFirst;
LinkButton btnPrev;
LinkButton btnNext;
LinkButton btnLast;
TextBox txtGoPage;
Button btnGo;
#endregion
protected override void CreateChildControls()
{
Controls.Clear();
lblMessage = new Label();
lblMessage.Text = "当前第" + CurPage + "页&nbsp;共" + PageCount + "页 &nbsp;共" + RowCount + "条记录";
lblMessage.ID = "lblMessage";
Controls.Add(lblMessage);
btnFirst = new LinkButton();
btnFirst.Text = "首页";
btnFirst.CommandName = "first";
btnFirst.ID = "btnFirst";
if (CurPage <= 1)
{
btnFirst.Enabled = false;
}
Controls.Add(btnFirst);
btnPrev = new LinkButton();
btnPrev.Text = "上一页";
btnPrev.CommandName = "prev";
btnPrev.ID = "btnPrev";
if (CurPage <= 1)
{
btnPrev.Enabled = false;
}
Controls.Add(btnPrev);
btnNext = new LinkButton();
btnNext.Text = "下一页";
btnNext.CommandName = "next";
btnNext.ID = "btnNext";
if (CurPage >= PageCount)
{
btnNext.Enabled = false;
}
Controls.Add(btnNext);
btnLast = new LinkButton();
btnLast.Text = "末页";
btnLast.CommandName = "last";
btnLast.ID = "btnLast";
if (CurPage >= PageCount)
{
btnLast.Enabled = false;
}
Controls.Add(btnLast);
txtGoPage = new TextBox();
txtGoPage.TabIndex = 1;
txtGoPage.ID = "txtGoPage";
txtGoPage.Attributes.Add("onkeyup", @"this.value=this.value.replace(/\D/g,'')");
txtGoPage.Attributes.Add("onafterpaste", @"this.value=this.value.replace(/\D/g,'')");
Controls.Add(txtGoPage);
btnGo = new Button();
btnGo.TabIndex = 2;
btnGo.CommandName = "go";
btnGo.Text = "GO";
btnGo.ID="btnGO";
Controls.Add(btnGo);
Debug.WriteLine("ffffffffffffffffffffffffffffffffffffffffffffffffff");
base.CreateChildControls();
}
public int RowCount
{
get
{
if (ViewState["m_rowCount"] == null || int.Parse(ViewState["m_rowCount"].ToString()) < 0)
{
ViewState["m_rowCount"] = 0;
}
return int.Parse(ViewState["m_rowCount"].ToString());
}
set
{
if (value < 0)
{
ViewState["m_rowCount"] = 0;
}
else
{
ViewState["m_rowCount"] = value;
}
this.RecreateChildControls();
}
}
public int CurPage
{
get
{
if (ViewState["m_curPage"] ==null || int.Parse(ViewState["m_curPage"].ToString()) < 1)
{
ViewState["m_curPage"] = 1;
}
return int.Parse(ViewState["m_curPage"].ToString());
}
set
{
if (value < 1)
{
ViewState["m_curPage"] = 1;
}
else if (value > PageCount)
{
ViewState["m_curPage"] = PageCount;
}
else
{
ViewState["m_curPage"] = value;
}
}
}
public int PageCount
{
get
{
return RowCount / PageSize + 1;
}
}
public int PageSize
{
get
{
if (ViewState["m_pageSize"] ==null || int.Parse(ViewState["m_pageSize"].ToString()) < 1)
{
ViewState["m_pageSize"] = 15;
}
return int.Parse(ViewState["m_pageSize"].ToString());
}
set
{
if (value > 0)
{
ViewState["m_pageSize"] = value;
this.RecreateChildControls();
}
}
}
protected override void RenderContents(HtmlTextWriter output)
{
output.RenderBeginTag(HtmlTextWriterTag.Tr);
output.AddStyleAttribute("text-align", "left");
output.RenderBeginTag(HtmlTextWriterTag.Td);
output.Write("&nbsp;&nbsp;");
lblMessage.RenderControl(output);
output.RenderEndTag();
output.AddStyleAttribute("text-align", "right");
output.RenderBeginTag(HtmlTextWriterTag.Td);
btnFirst.RenderControl(output);
output.Write("&nbsp;&nbsp;");
btnPrev.RenderControl(output);
output.Write("&nbsp;&nbsp;");
btnNext.RenderControl(output);
output.Write("&nbsp;&nbsp;");
btnLast.RenderControl(output);
output.Write("到");
output.AddStyleAttribute(HtmlTextWriterStyle.Width, "30px");
txtGoPage.RenderControl(output);
output.Write("页");
btnGo.RenderControl(output);
output.Write("&nbsp;&nbsp;");
output.RenderEndTag();
output.RenderEndTag();
}
protected override HtmlTextWriterTag TagKey
{
get
{
return HtmlTextWriterTag.Table;
}
}
public event PageOnEventHandler RecPageChanged;
protected override bool OnBubbleEvent(object source, EventArgs args)
{
bool handled = false;
CommandEventArgs cea = args as CommandEventArgs;
if(cea == null)
{
return handled;
}
switch (cea.CommandName)
{
case "first":
handled = true;
CurPage = 1;
break;
case "prev":
handled = true;
if (CurPage > 1)
{
CurPage--;
}
else
{
CurPage = 1;
}
break;
case "next":
handled = true;
if (CurPage < PageCount)
{
CurPage ++ ;
}
else
{
CurPage = PageCount;
}
break;
case "last":
handled = true;
CurPage = PageCount;
break;
case "go":
string strGo = txtGoPage.Text.Trim();
int iGo;
if (!string.IsNullOrEmpty(strGo) && int.TryParse(strGo, out iGo))
{
handled = true;
CurPage = iGo;
}
break;
}
if (handled)
{
if (this.RecPageChanged != null)
{
RecPageChanged(this, args);
this.RecreateChildControls();
}
return handled;
}
else
{
return base.OnBubbleEvent(source, args);
}
}
}
}

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