.net中gridview疑难解答(1)

for (int i = 0; i <= GridView1.Rows.Count - 1; i++) 
{ 
DataRowView mydrv; 
string gIntro; 
if (GridView1.PageIndex == 0) 
{ 
mydrv = myds.Tables["飞狐工作室"].DefaultView;//表名 
gIntro = Convert.ToString(mydrv["家庭住址"]);//所要处理的字段 
GridView1.Rows.Cells[3].Text = SubStr(gIntro, 2); 
} 
else 
{ 
mydrv = myds.Tables["飞狐工作室"].DefaultView[i + (5 * GridView1.PageIndex)]; 
gIntro = Convert.ToString(mydrv["家庭住址"]); 
GridView1.Rows.Cells[3].Text = SubStr(gIntro, 2); 
GridView1.Rows.Cells[3]. ToolTip=gIntro； 
} 
}  

public string SubStr(string sString, int nLeng) 
{ 
if (sString.Length <= nLeng) 
{ 
return sString; 
} 
string sNewStr = sString.Substring(0, nLeng); 
sNewStr = sNewStr + "..."; 
return sNewStr; 
}  

HTML code 
<%@ Page Language="C#" AutoEventWireup="true" EnableEventValidation="false" CodeFile="GridView.aspx.cs" Inherits="GridView" %>
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
http://www.w3.org/1999/xhtml" > 
C# code 
using System; 
using System.Data; 
using System.Configuration; 
using System.Collections; 
using System.Web; 
using System.Web.Security; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.Web.UI.WebControls.WebParts; 
using System.Web.UI.HtmlControls; 
using System.Data.SqlClient; 
public partial class GridView : System.Web.UI.Page 
{ 
protected ICollection CreateDataSource() 
{ 
System.Data.DataTable dt = new System.Data.DataTable(); 
System.Data.DataRow dr; 
dt.Columns.Add(new System.Data.DataColumn("学生班级", typeof(System.String))); 
dt.Columns.Add(new System.Data.DataColumn("学生姓名", typeof(System.String))); 
dt.Columns.Add(new System.Data.DataColumn("语文", typeof(System.Decimal))); 
dt.Columns.Add(new System.Data.DataColumn("数学", typeof(System.Decimal))); 
dt.Columns.Add(new System.Data.DataColumn("英语", typeof(System.Decimal))); 
dt.Columns.Add(new System.Data.DataColumn("计算机", typeof(System.Decimal))); 
dt.Columns.Add(new System.Data.DataColumn("布尔", typeof(System.Boolean))); 
for (int i = 0; i < 11; i++) 
{ 
System.Random rd = new System.Random(Environment.TickCount * i); ; 
dr = dt.NewRow(); 
dr[0] = "班级" + i.ToString(); 
dr[1] = "学生" + i.ToString(); 
dr[2] = System.Math.Round(rd.NextDouble() * 100, 2); 
dr[3] = System.Math.Round(rd.NextDouble() * 100, 2); 
dr[4] = System.Math.Round(rd.NextDouble() * 100, 2); 
dr[5] = System.Math.Round(rd.NextDouble() * 100, 2); 
dr[6] = i % 2 == 0 ? true : false; 
dt.Rows.Add(dr); 
} 
System.Data.DataView dv = new System.Data.DataView(dt); 
}