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DataGrid代码（二）

王朝c#·作者佚名 2006-01-10

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using System;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.ComponentModel;

using System.Drawing;

using System.Drawing.Design;

namespace MY.UI.WebControls

{

#region Summary

/// <summary>

/// DataGrid 的摘要说明。

/// </summary>

[

ToolboxBitmap(typeof(MY.UI.WebControls.DataGridTable), "MY.UI.WebControls.DataGridTable.bmp"),

///DefaultProperty("Text"),

ToolboxData("<{0}:DataGridTable runat=server></{0}:DataGridTable>")]

#endregion

public class DataGridTable : System.Web.UI.WebControls.DataGrid,INamingContainer,IPostBackEventHandler

{

#region Variable

private LinkButton startPage =new LinkButton();

private LinkButton prevPage =new LinkButton();

private LinkButton nextPage =new LinkButton();

private LinkButton endPage =new LinkButton();

private string sStartPage="StartPage";

private string sPrevPage="PrevPage";

private string sNextPage="NextPage";

private string sEndPage="EndPage";

private DropDownList numPage=new DropDownList();

private Panel myPanel=new Panel();

//private int maxRecord=0;

private string pageCSS="scrollButton";

#endregion

#region Event

//public event DataGridPageChangedEventHandler PageIndexChanged;

#endregion

#region Property

[Bindable(true),

Category("分页"),

DefaultValue("True"),Description("自定义分页")]

public bool IsAllowPaging

{

get

{

object obj=ViewState["isAllowPaging"];

return ((null ==obj ) ? true : Convert.ToBoolean( obj));

}

set

{

ViewState["isAllowPaging"]=value;

}

[Bindable(true),

Category("分页"),

Description("总记录数")]

public int MaxRecord

{

get

{

object obj=ViewState["maxRecord"];

return ((null ==obj ) ? 0 : Convert.ToInt32( obj));

}

set

{

ViewState["maxRecord"]=value;

}

[Bindable(true),

Category("翻页"),

DefaultValue("首页"),Description("回到首页")]

public string StartPage

{

get

{

return sStartPage;

}

set

{

sStartPage=value;

}

[Bindable(true),

Category("翻页"),

DefaultValue("尾页"),Description("回到尾页")]

public string EndPage

{

get

{

return sEndPage;

}

set

{

sEndPage=value;

}

[Bindable(true),

Category("翻页"),

DefaultValue("前页"),Description("上一页")]

public string PrevPage

{

get

{

return sPrevPage;

}

set

{

sPrevPage=value;

}

[Bindable(true),

Category("翻页"),

DefaultValue("后页"),Description("下一页")]

public string NextPage

{

get

{

return sNextPage;

}

set

{

sNextPage=value;

}

[Bindable(true),

Category("翻页外观"),

DefaultValue(""),Description("按钮的CSS")]

public string PageCSS

{

get

{

return pageCSS;

}

set

{

pageCSS=value;

}

#endregion

#region 构造

public DataGridTable():base(){

}*/

#endregion

#region Method

protected override void OnInit(EventArgs e)

{

EnableViewState = true;

//判断样式是否存在,不存在样式进行样式初始化

if ((base.CssClass == null) || base.CssClass.Trim().Equals(""))

{

CssClass = "tableGrid";

}

if ((base.HeaderStyle.CssClass == null) || base.HeaderStyle.CssClass.Trim().Equals(""))

{

HeaderStyle.CssClass = "gridHeader";

}

if ((base.FooterStyle.CssClass == null) || base.FooterStyle.CssClass.Trim().Equals(""))

{

FooterStyle.CssClass = "gridFooter";

}

if ((base.PagerStyle.CssClass == null) || base.PagerStyle.CssClass.Trim().Equals(""))

{

PagerStyle.CssClass = "gridPager";

}

if ((base.ItemStyle.CssClass == null) || base.ItemStyle.CssClass.Trim().Equals(""))

{

ItemStyle.CssClass = "gridItem";

}

if ((base.AlternatingItemStyle.CssClass == null) || base.AlternatingItemStyle.CssClass.Trim().Equals(""))

{

AlternatingItemStyle.CssClass = "gridAltItem";

}

if ((base.EditItemStyle.CssClass == null) || base.EditItemStyle.CssClass.Trim().Equals(""))

{

EditItemStyle.CssClass = "gridEditItem";

}

if ((base.SelectedItemStyle.CssClass == null) || base.SelectedItemStyle.CssClass.Trim().Equals(""))

{

SelectedItemStyle.CssClass = "gridSelectedItem";

}

//~样式初始化完毕

base.OnInit(e);

}

protected override void OnPreRender(EventArgs e)

{

Page.GetPostBackEventReference(this);

}

protected override void OnItemDataBound(DataGridItemEventArgs e)

{

base.OnItemDataBound(e);

}

protected override void OnItemCommand(DataGridCommandEventArgs e)

{

base.OnItemCommand(e);

}

protected override bool OnBubbleEvent(object source,EventArgs e)

{

return base.OnBubbleEvent( source,e);

}

/// <summary>

/// 捕获回发事件

/// </summary>

/// <param name="eventArgument">命令行</param>

public void RaisePostBackEvent(string eventArgument)

{

int NewPageIndex=0;

if(PagerStyle.Position.Equals(PagerPosition.Bottom))

{

CurrentPageIndex=Convert.ToInt32( Page.Request.Params[this.UniqueID+":numPageBottom"])-1;

}

else

{

CurrentPageIndex=Convert.ToInt32( Page.Request.Params[this.UniqueID+":numPageTop"])-1;

}

if("prevPage".Equals( eventArgument))

{

NewPageIndex=CurrentPageIndex-1;

}

else if("nextPage".Equals( eventArgument))

{

NewPageIndex=CurrentPageIndex+1;

}

else if(eventArgument.StartsWith("endPage" ))

{

NewPageIndex=Convert.ToInt32(eventArgument.Substring(7));

}

else if("numPageTop".Equals( eventArgument))

{

NewPageIndex=Convert.ToInt32( Page.Request.Params[this.UniqueID+":numPageTop"])-1;

}

else if("numPageBottom".Equals( eventArgument))

{

NewPageIndex=Convert.ToInt32( Page.Request.Params[this.UniqueID+":numPageBottom"])-1;

}

OnPageIndexChanged(new DataGridPageChangedEventArgs(this,NewPageIndex));

}

/// <summary>

/// 将此控件呈现给指定的输出参数。

/// </summary>

/// <param name="output"> 要写出到的 HTML 编写器 </param>

///

protected override void Render(HtmlTextWriter output)

{

if(IsAllowPaging)

{

AllowPaging=true;

PagerStyle.Visible=false;

myPanel.CopyBaseAttributes(this);

Style.Remove("POSITION");

Style.Remove("Z-INDEX");

myPanel.RenderBeginTag(output);

Table table=new Table();

table.CopyBaseAttributes(this);

table.BackColor=(PagerStyle.BackColor.Equals(Color.Empty))?this.BackColor:PagerStyle.BackColor;

table.BackImageUrl=BackImageUrl;

table.BorderColor=PagerStyle.BorderColor.IsEmpty?BorderColor:PagerStyle.BorderColor;

table.BorderStyle=PagerStyle.BorderStyle;

table.BorderWidth=Unit.Point(0);//(PagerStyle.BorderWidth.IsEmpty)?BorderWidth:PagerStyle.BorderWidth;

table.HorizontalAlign=this.HorizontalAlign;

table.Width=Width;

table.CellPadding=CellPadding;

table.CellSpacing=CellSpacing;

table.GridLines=GridLines;

table.Font.Size=FontUnit.Point(9);

TableRow tr=new TableRow();

table.Controls.Add(tr);

TableCell td=new TableCell();

startPage.CssClass=pageCSS;

startPage.Text=sStartPage;

prevPage.CssClass=pageCSS;

prevPage.Text=sPrevPage;

nextPage.CssClass=pageCSS;

nextPage.Text=sNextPage;

endPage.CssClass=pageCSS;

endPage.Text=sEndPage;

numPage.CssClass=pageCSS;

tr.Controls.Add(td);

td.Attributes["style"]="BORDER-TOP-STYLE: none; BORDER-RIGHT-STYLE: none; BORDER-LEFT-STYLE: none; BORDER-BOTTOM-STYLE: none";

td.Controls.Add(new LiteralControl("  共"+MaxRecord+"条/每页"+PageSize+"条"));

td.Controls.Add(new LiteralControl(" 当前第"+(CurrentPageIndex+1)+"页/共"+PageCount+"页"));

td.Controls.Add(new LiteralControl("</td><td style=\"BORDER-TOP-STYLE: none; BORDER-RIGHT-STYLE: none; BORDER-LEFT-STYLE: none; BORDER-BOTTOM-STYLE: none\">"));

if(CurrentPageIndex!=0)

{

startPage.Attributes["href"]="javascript:"+Page.GetPostBackEventReference(this,"startPage");

prevPage.Attributes["href"]="javascript:"+Page.GetPostBackEventReference(this,"prevPage");

td.Controls.Add(startPage);

td.Controls.Add(new LiteralControl(" "));

td.Controls.Add(prevPage);

td.Controls.Add(new LiteralControl(" "));

}

else

{

td.Controls.Add(new LiteralControl("          "));

}

if(CurrentPageIndex<(PageCount-1))

{

nextPage.Attributes["href"]="javascript:"+Page.GetPostBackEventReference(this,"nextPage");

endPage.Attributes["href"]="javascript:"+Page.GetPostBackEventReference(this,"endPage"+(PageCount-1));

td.Controls.Add(nextPage);

td.Controls.Add(new LiteralControl(" "));

td.Controls.Add(endPage);

td.Controls.Add(new LiteralControl(" "));

}

else

{

td.Controls.Add(new LiteralControl("          "));

}

for(int i=0;i<PageCount;i++)

{

ListItem list=new ListItem((i+1).ToString());

if(i==CurrentPageIndex) list.Selected=true;

numPage.Items.Add(list);

}

td.Controls.Add(new LiteralControl("</td><td align=right style=\"BORDER-TOP-STYLE: none; BORDER-RIGHT-STYLE: none; BORDER-LEFT-STYLE: none; BORDER-BOTTOM-STYLE: none\">转到第"));

td.Controls.Add(numPage);

td.Controls.Add(new LiteralControl("页"));

if(PagerStyle.Position==PagerPosition.Top||PagerStyle.Position==PagerPosition.TopAndBottom)

{

numPage.ID=this.UniqueID+":numPageTop";

numPage.Attributes["onchange"]=Page.GetPostBackEventReference(this,"numPageTop");

table.RenderControl(output);

}

base.Render(output);

if(PagerStyle.Position==PagerPosition.Bottom||PagerStyle.Position==PagerPosition.TopAndBottom)

{

numPage.ID=this.UniqueID+":numPageBottom";