数据控件-DataGrid数据控件
DataGrid数据控件是3个数据控件中功能最强大的一个。使用DataGrid控件可以自动显示表的内容。利用DataReader对象或者DataSet对象和DataGrid控件进行绑定，就可以进行数据输出。
1、利用DataGrid控件实现分页
可以把前页和后页改成数字显示。修改为PagerStyle-Mode="NumericPages"可以实现数字显示。
一般用表格显示数据的时候，将某列显示成超级链接的形式，用来进一步显示该记录的详细信息。
利用HyperLinkColumn控件设置显示链接的列，DataNavigateUrlField属性表示链接的字段，DataNavigateUrlFormatString属性表示链接的地址。
2、利用DataGrid控件动态添加数据
程序中利用ItemStyle-Wrap="false"语句设置不折行显示，利用DataKeyField="学号"语句设置关键字段是学号，因此可以利用dg.DataKeys[(int)e.item.ItemIndex]取出某行的学号。取其行的其它列时，使用((TextBox)e.Item.Cells[3].Controls[0]).Text语句，e中存储当前的所有对象，通过表格和控件的定位，得到文本框的值。
1、利用DataGrid控件实现分页
<
asp:DataGrid ID
=
"
dg
"
runat
=
"
server
"
AllowPaging
=
"
True
"
BorderColor
=
"
Black
"
CellPadding = " 2 " OnPageIndexChanged = " ChangePage " PageSize = " 5 " >
< PagerStyle HorizontalAlign = " Right " NextPageText = " 后页 " PrevPageText = " 前页 " />
< AlternatingItemStyle BackColor = " #FFFFCD " />
< HeaderStyle BackColor = " #AAAADD " />
</ asp:DataGrid >
protected void Page_Load( object sender, EventArgs e)
{
BindGrid();
}
private void BindGrid()
{
string Provider, DataBase, ConnStr, SQL;
Provider = " Microsoft.Jet.OLEDB.4.0; " ;
DataBase = Server.MapPath( " person.mdb " );
ConnStr = " Provider= " + Provider + " Data Source= " + DataBase;
SQL = " select * from grade " ;
OleDbDataAdapter da;
da = new OleDbDataAdapter(SQL, ConnStr);
DataSet ds = new DataSet();
da.Fill(ds, " grade " );
dg.DataSource = ds.Tables[ " grade " ].DefaultView;
dg.DataBind();
}
public void ChangePage( object sender, DataGridPageChangedEventArgs e)
{
dg.CurrentPageIndex = e.NewPageIndex;
BindGrid();
}
CellPadding = " 2 " OnPageIndexChanged = " ChangePage " PageSize = " 5 " >
< PagerStyle HorizontalAlign = " Right " NextPageText = " 后页 " PrevPageText = " 前页 " />
< AlternatingItemStyle BackColor = " #FFFFCD " />
< HeaderStyle BackColor = " #AAAADD " />
</ asp:DataGrid >
protected void Page_Load( object sender, EventArgs e)
{
BindGrid();
}
private void BindGrid()
{
string Provider, DataBase, ConnStr, SQL;
Provider = " Microsoft.Jet.OLEDB.4.0; " ;
DataBase = Server.MapPath( " person.mdb " );
ConnStr = " Provider= " + Provider + " Data Source= " + DataBase;
SQL = " select * from grade " ;
OleDbDataAdapter da;
da = new OleDbDataAdapter(SQL, ConnStr);
DataSet ds = new DataSet();
da.Fill(ds, " grade " );
dg.DataSource = ds.Tables[ " grade " ].DefaultView;
dg.DataBind();
}
public void ChangePage( object sender, DataGridPageChangedEventArgs e)
{
dg.CurrentPageIndex = e.NewPageIndex;
BindGrid();
}
可以把前页和后页改成数字显示。修改为PagerStyle-Mode="NumericPages"可以实现数字显示。
一般用表格显示数据的时候，将某列显示成超级链接的形式，用来进一步显示该记录的详细信息。
利用HyperLinkColumn控件设置显示链接的列，DataNavigateUrlField属性表示链接的字段，DataNavigateUrlFormatString属性表示链接的地址。
<
asp:DataGrid ID
=
"
dg
"
runat
=
"
server
"
AllowPaging
=
"
True
"
BorderColor
=
"
Black
"
CellPadding = " 2 " OnPageIndexChanged = " ChangePage " PageSize = " 5 " AutoGenerateColumns = " False " >
< PagerStyle HorizontalAlign = " Right " NextPageText = " 后页 " PrevPageText = " 前页 " Mode = " NumericPages " />
< AlternatingItemStyle BackColor = " #FFFFCD " />
< HeaderStyle BackColor = " #AAAADD " />
< Columns >
< asp:HyperLinkColumn DataTextField = " 学号 " HeaderText = " 学号 "
DataNavigateUrlField = " 学号 "
DataNavigateUrlFormatString = " test.aspx?id={0} "
Target = " _blank " />
< asp:BoundColumn DataField = " 姓名 " HeaderText = " 姓名 " />
< asp:BoundColumn DataField = " 数学 " HeaderText = " 数学成绩 " ItemStyle - HorizontalAlign = " Right " />
</ Columns >
</ asp:DataGrid >
protected void Page_Load( object sender, EventArgs e)
{
BindGrid();
}
private void BindGrid()
{
string Provider, DataBase, ConnStr, SQL;
Provider = " Microsoft.Jet.OLEDB.4.0; " ;
DataBase = Server.MapPath( " person.mdb " );
ConnStr = " Provider= " + Provider + " Data Source= " + DataBase;
SQL = " select * from grade " ;
OleDbDataAdapter da;
da = new OleDbDataAdapter(SQL, ConnStr);
DataSet ds = new DataSet();
da.Fill(ds, " grade " );
dg.DataSource = ds.Tables[ " grade " ].DefaultView;
dg.DataBind();
}
public void ChangePage( object sender, DataGridPageChangedEventArgs e)
{
dg.CurrentPageIndex = e.NewPageIndex;
BindGrid();
}
// 当单击某一行超级链接时，自动弹出新网页，调用程序test.aspx
protected void Page_Load( object sender, EventArgs e)
{
OleDbConnection Conn;
Conn = new OleDbConnection( " Provider=Microsoft.Jet.OLEDB.4.0; " +
" Data Source= " + Server.MapPath( " person.mdb " ));
Conn.Open();
string strSQL = " select * from grade where 学号= " + Request[ " id " ];
OleDbCommand Comm = new OleDbCommand(strSQL, Conn);
OleDbDataReader dr = Comm.ExecuteReader();
string html = " " ;
while (dr.Read())
{
html += " <h1>学员： " ;
html += " <font color=red> " + dr[ " 姓名 " ].ToString() + " </font>的成绩为：</h1><br> " ;
html += " 学号为： " + dr[ " 学号 " ].ToString() + " <br> " ;
html += " 数学成绩为： " + dr[ " 数学 " ].ToString() + " <br> " ;
html += "" ;
}
Response.Write(html);
Conn.Close();
}
CellPadding = " 2 " OnPageIndexChanged = " ChangePage " PageSize = " 5 " AutoGenerateColumns = " False " >
< PagerStyle HorizontalAlign = " Right " NextPageText = " 后页 " PrevPageText = " 前页 " Mode = " NumericPages " />
< AlternatingItemStyle BackColor = " #FFFFCD " />
< HeaderStyle BackColor = " #AAAADD " />
< Columns >
< asp:HyperLinkColumn DataTextField = " 学号 " HeaderText = " 学号 "
DataNavigateUrlField = " 学号 "
DataNavigateUrlFormatString = " test.aspx?id={0} "
Target = " _blank " />
< asp:BoundColumn DataField = " 姓名 " HeaderText = " 姓名 " />
< asp:BoundColumn DataField = " 数学 " HeaderText = " 数学成绩 " ItemStyle - HorizontalAlign = " Right " />
</ Columns >
</ asp:DataGrid >
protected void Page_Load( object sender, EventArgs e)
{
BindGrid();
}
private void BindGrid()
{
string Provider, DataBase, ConnStr, SQL;
Provider = " Microsoft.Jet.OLEDB.4.0; " ;
DataBase = Server.MapPath( " person.mdb " );
ConnStr = " Provider= " + Provider + " Data Source= " + DataBase;
SQL = " select * from grade " ;
OleDbDataAdapter da;
da = new OleDbDataAdapter(SQL, ConnStr);
DataSet ds = new DataSet();
da.Fill(ds, " grade " );
dg.DataSource = ds.Tables[ " grade " ].DefaultView;
dg.DataBind();
}
public void ChangePage( object sender, DataGridPageChangedEventArgs e)
{
dg.CurrentPageIndex = e.NewPageIndex;
BindGrid();
}
// 当单击某一行超级链接时，自动弹出新网页，调用程序test.aspx
protected void Page_Load( object sender, EventArgs e)
{
OleDbConnection Conn;
Conn = new OleDbConnection( " Provider=Microsoft.Jet.OLEDB.4.0; " +
" Data Source= " + Server.MapPath( " person.mdb " ));
Conn.Open();
string strSQL = " select * from grade where 学号= " + Request[ " id " ];
OleDbCommand Comm = new OleDbCommand(strSQL, Conn);
OleDbDataReader dr = Comm.ExecuteReader();
string html = " " ;
while (dr.Read())
{
html += " <h1>学员： " ;
html += " <font color=red> " + dr[ " 姓名 " ].ToString() + " </font>的成绩为：</h1><br> " ;
html += " 学号为： " + dr[ " 学号 " ].ToString() + " <br> " ;
html += " 数学成绩为： " + dr[ " 数学 " ].ToString() + " <br> " ;
html += "" ;
}
Response.Write(html);
Conn.Close();
}
2、利用DataGrid控件动态添加数据
public
partial
class
_Default : System.Web.UI.Page
{
OleDbConnection Conn;
protected void Page_Load( object sender, EventArgs e)
{
string Provider, DataBase, ConnStr, SQL;
Provider = " Microsoft.Jet.OLEDB.4.0; " ;
DataBase = Server.MapPath( " person.mdb " );
ConnStr = " Provider= " + Provider + " Data Source= " + DataBase;
Conn = new OleDbConnection(ConnStr);
if ( ! IsPostBack) BindGrid();
}
private void BindGrid()
{
OleDbDataAdapter da = new OleDbDataAdapter( " select * from grade " , Conn);
DataSet ds = new DataSet();
da.Fill(ds);
dg.DataSource = ds;
dg.DataBind();
}
public void ChangePage( object sender, DataGridPageChangedEventArgs e)
{
dg.CurrentPageIndex = e.NewPageIndex;
BindGrid();
}
public void Add_Click( object sender, EventArgs E)
{
String strSQL = " insert into grade values( " + id.Text + " ,' " + sex.Text + " ',' " + name.Text + " ', " +
yuwen.Text + " , " + math.Text + " , " + english.Text + " ) " ;
OleDbCommand Comm = new OleDbCommand(strSQL, Conn);
Conn.Open();
try
{
Comm.ExecuteNonQuery();
Message.InnerHtml = " <b>添加成功</b> " ;
}
catch (OleDbException)
{
Message.InnerHtml = " 添加失败 " ;
Message.Style[ " color " ] = " red " ;
}
Conn.Close();
BindGrid();
}
}
< form id = " form1 " runat = " server " >
< table width = " 95% " >
< tr >
< td valign = " top " >
< asp:DataGrid ID = " dg " runat = " server " BorderColor = " Black " CellPadding = " 3 "
OnPageIndexChanged = " ChangePage " PageSize = " 5 " AutoGenerateColumns = " False " BackColor = " #CCCCFF " Font - Names = " Verdana " Font - Size = " 9pt " Width = " 400px " >
< PagerStyle HorizontalAlign = " Right " NextPageText = " 后页 " PrevPageText = " 前页 " Mode = " NumericPages " />
< HeaderStyle BackColor = " #AAAADD " />
< Columns >
< asp:BoundColumn DataField = " 学号 " HeaderText = " 学号 " />
< asp:BoundColumn DataField = " 性别 " HeaderText = " 性别 " />
< asp:BoundColumn DataField = " 姓名 " HeaderText = " 姓名 " />
< asp:BoundColumn DataField = " 语文 " HeaderText = " 语文 " />
< asp:BoundColumn DataField = " 数学 " HeaderText = " 数学 " />
< asp:BoundColumn DataField = " 英语 " HeaderText = " 英语 " />
</ Columns >
</ asp:DataGrid >
</ td >
< td valign = " top " >
< table style = " font:8pt verdana " >
< tr >
< td colspan = " 2 " bgcolor = " #aaaadd " style = " font:10pt verdana " > 添加新的学员：
</ td >
</ tr >
< tr >< td nowrap > 学号： </ td >
< td >< asp:TextBox ID = " id " runat = " server " /></ td >
</ tr >
< tr >< td nowrap > 性别： </ td >
< td >< asp:TextBox ID = " sex " runat = " server " /></ td >
</ tr >
< tr >< td nowrap > 姓名： </ td >
< td >< asp:TextBox ID = " name " runat = " server " /></ td >
</ tr >
< tr >< td nowrap > 语文： </ td >
< td >< asp:TextBox ID = " yuwen " runat = " server " /></ td >
</ tr >
< tr >< td nowrap > 数学： </ td >
< td >< asp:TextBox ID = " math " runat = " server " /></ td >
</ tr >
< tr >< td nowrap > 英语： </ td >
< td >< asp:TextBox ID = " english " runat = " server " /></ td >
</ tr >
< tr >< td colspan = " 2 " style = " padding-top:15 " align = " center " >
< asp:Button Text = " 添加 " OnClick = " Add_Click " runat = " Server " /></ td >
</ tr >
< tr >< td colspan = " 2 " style = " padding-top:15 " align = " center " >
< span id = " Message " style = " font:arial 11pt; " runat = " server " /></ td ></ tr >
</ table >
</ td >
</ tr >
</ table >
</ form >
3、使用DataGrid控件动态操作数据
{
OleDbConnection Conn;
protected void Page_Load( object sender, EventArgs e)
{
string Provider, DataBase, ConnStr, SQL;
Provider = " Microsoft.Jet.OLEDB.4.0; " ;
DataBase = Server.MapPath( " person.mdb " );
ConnStr = " Provider= " + Provider + " Data Source= " + DataBase;
Conn = new OleDbConnection(ConnStr);
if ( ! IsPostBack) BindGrid();
}
private void BindGrid()
{
OleDbDataAdapter da = new OleDbDataAdapter( " select * from grade " , Conn);
DataSet ds = new DataSet();
da.Fill(ds);
dg.DataSource = ds;
dg.DataBind();
}
public void ChangePage( object sender, DataGridPageChangedEventArgs e)
{
dg.CurrentPageIndex = e.NewPageIndex;
BindGrid();
}
public void Add_Click( object sender, EventArgs E)
{
String strSQL = " insert into grade values( " + id.Text + " ,' " + sex.Text + " ',' " + name.Text + " ', " +
yuwen.Text + " , " + math.Text + " , " + english.Text + " ) " ;
OleDbCommand Comm = new OleDbCommand(strSQL, Conn);
Conn.Open();
try
{
Comm.ExecuteNonQuery();
Message.InnerHtml = " <b>添加成功</b> " ;
}
catch (OleDbException)
{
Message.InnerHtml = " 添加失败 " ;
Message.Style[ " color " ] = " red " ;
}
Conn.Close();
BindGrid();
}
}
< form id = " form1 " runat = " server " >
< table width = " 95% " >
< tr >
< td valign = " top " >
< asp:DataGrid ID = " dg " runat = " server " BorderColor = " Black " CellPadding = " 3 "
OnPageIndexChanged = " ChangePage " PageSize = " 5 " AutoGenerateColumns = " False " BackColor = " #CCCCFF " Font - Names = " Verdana " Font - Size = " 9pt " Width = " 400px " >
< PagerStyle HorizontalAlign = " Right " NextPageText = " 后页 " PrevPageText = " 前页 " Mode = " NumericPages " />
< HeaderStyle BackColor = " #AAAADD " />
< Columns >
< asp:BoundColumn DataField = " 学号 " HeaderText = " 学号 " />
< asp:BoundColumn DataField = " 性别 " HeaderText = " 性别 " />
< asp:BoundColumn DataField = " 姓名 " HeaderText = " 姓名 " />
< asp:BoundColumn DataField = " 语文 " HeaderText = " 语文 " />
< asp:BoundColumn DataField = " 数学 " HeaderText = " 数学 " />
< asp:BoundColumn DataField = " 英语 " HeaderText = " 英语 " />
</ Columns >
</ asp:DataGrid >
</ td >
< td valign = " top " >
< table style = " font:8pt verdana " >
< tr >
< td colspan = " 2 " bgcolor = " #aaaadd " style = " font:10pt verdana " > 添加新的学员：
</ td >
</ tr >
< tr >< td nowrap > 学号： </ td >
< td >< asp:TextBox ID = " id " runat = " server " /></ td >
</ tr >
< tr >< td nowrap > 性别： </ td >
< td >< asp:TextBox ID = " sex " runat = " server " /></ td >
</ tr >
< tr >< td nowrap > 姓名： </ td >
< td >< asp:TextBox ID = " name " runat = " server " /></ td >
</ tr >
< tr >< td nowrap > 语文： </ td >
< td >< asp:TextBox ID = " yuwen " runat = " server " /></ td >
</ tr >
< tr >< td nowrap > 数学： </ td >
< td >< asp:TextBox ID = " math " runat = " server " /></ td >
</ tr >
< tr >< td nowrap > 英语： </ td >
< td >< asp:TextBox ID = " english " runat = " server " /></ td >
</ tr >
< tr >< td colspan = " 2 " style = " padding-top:15 " align = " center " >
< asp:Button Text = " 添加 " OnClick = " Add_Click " runat = " Server " /></ td >
</ tr >
< tr >< td colspan = " 2 " style = " padding-top:15 " align = " center " >
< span id = " Message " style = " font:arial 11pt; " runat = " server " /></ td ></ tr >
</ table >
</ td >
</ tr >
</ table >
</ form >
public
partial
class
_Default : System.Web.UI.Page
{
OleDbConnection Conn;
protected void Page_Load( object sender, EventArgs e)
{
string Provider, DataBase, ConnStr;
Provider = " Microsoft.Jet.OLEDB.4.0; " ;
DataBase = Server.MapPath( " person.mdb " );
ConnStr = " Provider= " + Provider + " Data Source= " + DataBase;
Conn = new OleDbConnection(ConnStr);
if ( ! IsPostBack) BindGrid();
}
private void BindGrid()
{
OleDbDataAdapter da = new OleDbDataAdapter( " select * from grade order by 学号 " , Conn);
DataSet ds = new DataSet();
da.Fill(ds);
dg.DataSource = ds;
dg.DataBind();
}
public void DataGrid_Edit( object sender, DataGridCommandEventArgs e)
{
dg.EditItemIndex = ( int )e.Item.ItemIndex;
BindGrid();
}
public void DataGrid_Cancel( object sender, DataGridCommandEventArgs e)
{
dg.EditItemIndex = - 1 ;
BindGrid();
}
public void DataGrid_Update( object sender, DataGridCommandEventArgs e)
{
string strSQL = " update grade set " +
" 姓名=' " + ((TextBox)e.Item.Cells[ 3 ].Controls[ 0 ]).Text
+ " ',数学= " + ((TextBox)e.Item.Cells[ 4 ].Controls[ 0 ]).Text
+ " where 学号= " + dg.DataKeys[( int )e.Item.ItemIndex];
OleDbCommand cm = new OleDbCommand(strSQL, Conn);
Conn.Open();
try
{
cm.ExecuteNonQuery();
Message.InnerHtml = " <b>编辑成功</b> " ;
dg.EditItemIndex = - 1 ;
}
catch (OleDbException)
{
Message.InnerHtml = " 编辑失败 " ;
Message.Style[ " color " ] = " red " ;
}
cm.Connection.Close();
BindGrid();
}
public void DataGrid_Delete( object sender, DataGridCommandEventArgs e)
{
string strSQL = " delete from grade where 学号= "
+ dg.DataKeys[( int )e.Item.ItemIndex];
OleDbCommand cm = new OleDbCommand(strSQL, Conn);
Conn.Open();
try
{
cm.ExecuteNonQuery();
Message.InnerHtml = " <b>删除成功</b> " ;
}
catch (OleDbException)
{
Message.InnerHtml = " <b>删除失败</b> " ;
Message.Style[ " color " ] = " red " ;
}
Conn.Close();
BindGrid();
}
}
< form id = " form1 " runat = " server " >
< asp:DataGrid ID = " dg " runat = " server " Width = " 400 " BackColor = " #ccccff " BorderColor = " black "
ShowFooter = " false " CellPadding = " 3 " CellSpacing = " 0 " Font - Name = " Verdana " Font - Size = " 8pt "
HeaderStyle - BackColor = " #aaaadd " DataKeyField = " 学号 " AutoGenerateColumns = " false "
OnEditCommand = " DataGrid_Edit "
OnCancelCommand = " DataGrid_Cancel "
OnUpdateCommand = " DataGrid_Update "
OnDeleteCommand = " DataGrid_Delete " >
< Columns >
< asp:EditCommandColumn EditText = " 编辑 " CancelText = " 取消 " UpdateText = " 更新 " ItemStyle - Wrap = " false " />
< asp:ButtonColumn Text = " 删除 " CommandName = " Delete " ItemStyle - Wrap = " false " />
< asp:BoundColumn HeaderText = " 学号 " DataField = " 学号 " ReadOnly = " true " />
< asp:BoundColumn HeaderText = " 姓名 " DataField = " 姓名 " />
< asp:BoundColumn HeaderText = " 数学 " DataField = " 数学 " />
</ Columns >
</ asp:DataGrid >
< span id = " Message " style = " font:arial 11pt; " runat = " Server " />
</ form >
{
OleDbConnection Conn;
protected void Page_Load( object sender, EventArgs e)
{
string Provider, DataBase, ConnStr;
Provider = " Microsoft.Jet.OLEDB.4.0; " ;
DataBase = Server.MapPath( " person.mdb " );
ConnStr = " Provider= " + Provider + " Data Source= " + DataBase;
Conn = new OleDbConnection(ConnStr);
if ( ! IsPostBack) BindGrid();
}
private void BindGrid()
{
OleDbDataAdapter da = new OleDbDataAdapter( " select * from grade order by 学号 " , Conn);
DataSet ds = new DataSet();
da.Fill(ds);
dg.DataSource = ds;
dg.DataBind();
}
public void DataGrid_Edit( object sender, DataGridCommandEventArgs e)
{
dg.EditItemIndex = ( int )e.Item.ItemIndex;
BindGrid();
}
public void DataGrid_Cancel( object sender, DataGridCommandEventArgs e)
{
dg.EditItemIndex = - 1 ;
BindGrid();
}
public void DataGrid_Update( object sender, DataGridCommandEventArgs e)
{
string strSQL = " update grade set " +
" 姓名=' " + ((TextBox)e.Item.Cells[ 3 ].Controls[ 0 ]).Text
+ " ',数学= " + ((TextBox)e.Item.Cells[ 4 ].Controls[ 0 ]).Text
+ " where 学号= " + dg.DataKeys[( int )e.Item.ItemIndex];
OleDbCommand cm = new OleDbCommand(strSQL, Conn);
Conn.Open();
try
{
cm.ExecuteNonQuery();
Message.InnerHtml = " <b>编辑成功</b> " ;
dg.EditItemIndex = - 1 ;
}
catch (OleDbException)
{
Message.InnerHtml = " 编辑失败 " ;
Message.Style[ " color " ] = " red " ;
}
cm.Connection.Close();
BindGrid();
}
public void DataGrid_Delete( object sender, DataGridCommandEventArgs e)
{
string strSQL = " delete from grade where 学号= "
+ dg.DataKeys[( int )e.Item.ItemIndex];
OleDbCommand cm = new OleDbCommand(strSQL, Conn);
Conn.Open();
try
{
cm.ExecuteNonQuery();
Message.InnerHtml = " <b>删除成功</b> " ;
}
catch (OleDbException)
{
Message.InnerHtml = " <b>删除失败</b> " ;
Message.Style[ " color " ] = " red " ;
}
Conn.Close();
BindGrid();
}
}
< form id = " form1 " runat = " server " >
< asp:DataGrid ID = " dg " runat = " server " Width = " 400 " BackColor = " #ccccff " BorderColor = " black "
ShowFooter = " false " CellPadding = " 3 " CellSpacing = " 0 " Font - Name = " Verdana " Font - Size = " 8pt "
HeaderStyle - BackColor = " #aaaadd " DataKeyField = " 学号 " AutoGenerateColumns = " false "
OnEditCommand = " DataGrid_Edit "
OnCancelCommand = " DataGrid_Cancel "
OnUpdateCommand = " DataGrid_Update "
OnDeleteCommand = " DataGrid_Delete " >
< Columns >
< asp:EditCommandColumn EditText = " 编辑 " CancelText = " 取消 " UpdateText = " 更新 " ItemStyle - Wrap = " false " />
< asp:ButtonColumn Text = " 删除 " CommandName = " Delete " ItemStyle - Wrap = " false " />
< asp:BoundColumn HeaderText = " 学号 " DataField = " 学号 " ReadOnly = " true " />
< asp:BoundColumn HeaderText = " 姓名 " DataField = " 姓名 " />
< asp:BoundColumn HeaderText = " 数学 " DataField = " 数学 " />
</ Columns >
</ asp:DataGrid >
< span id = " Message " style = " font:arial 11pt; " runat = " Server " />
</ form >
程序中利用ItemStyle-Wrap="false"语句设置不折行显示，利用DataKeyField="学号"语句设置关键字段是学号，因此可以利用dg.DataKeys[(int)e.item.ItemIndex]取出某行的学号。取其行的其它列时，使用((TextBox)e.Item.Cells[3].Controls[0]).Text语句，e中存储当前的所有对象，通过表格和控件的定位，得到文本框的值。