Front-end:
<% @ Page Language = "C #" codebehind = "webform28.aspx. cs" autoeventwireup = "false" inherits = "csdn. webform28" %>
<! Doctype HTML public "-// W3C // dtd html 4.0 transitional // en">
<HTML>
<Head>
<Title> webform28 </title>
<Meta name = "generator" content = "Microsoft Visual Studio. NET 7.1">
<Meta name = "code_language" content = "C #">
<Meta name = "vs_defaultclientscript" content = "JavaScript">
<Link href = "css.css" rel = "stylesheet" type = "text/CSS">
<Meta name = "vs_targetschema" content = "http://schemas.microsoft.com/intellisense/ie5">
</Head>
<Body>
<Form ID = "form1" method = "Post" runat = "server">
<Asp: dropdownlist id = "dropdownlist1" runat = "server" autopostback = "true"> </ASP: dropdownlist>
<Asp: DataGrid id = "datagrid1" runat = "server" autogeneratecolumns = "false" cellspacing = "1" borderwidth = "0px"
Cellpadding = "5" cssclass = "border" oneditcommand = "edit" oncancelcommand = "cancel" onupdatecommand = "Update"
Datakeyfield = "stuid">
<Itemstyle cssclass = "item"> </itemstyle>
<Headerstyle cssclass = "Header"> <Columns>
<Asp: templatecolumn headertext = "name">
<Itemtemplate>
<% # Databinder. eval (container. dataitem, "stuname") %>
</Itemtemplate>
<Edititemtemplate>
<Asp: textbox id = "name" runat = "server" text = '<% # databinder. eval (container. dataitem, "stuname") %> 'width = "88px">
</ASP: textbox>
</Edititemtemplate>
</ASP: templatecolumn>
<Asp: templatecolumn headertext = "">
<Itemtemplate>
<% # Databinder. eval (container. dataitem, "depname") %>
</Itemtemplate>
<Edititemtemplate>
<Asp: dropdownlist id = "Dep" runat = "server"> </ASP: dropdownlist>
</Edititemtemplate>
</ASP: templatecolumn>
<Asp: editcommandcolumn buttontype = "Pushbutton" updatetext = "Update" canceltext = "cancel" edittext = "edit"> </ASP: editcommandcolumn>
</Columns>
</ASP: DataGrid>
</Form>
</Body>
</Html>
Background:
Using system;
Using system. collections;
Using system. componentmodel;
Using system. Data;
Using system. Data. sqlclient;
Using system. drawing;
Using system. Web;
Using system. Web. sessionstate;
Using system. Web. UI;
Using system. Web. UI. webcontrols;
Using system. Web. UI. htmlcontrols;
Namespace csdn
{
/// <Summary>
/// Summary of webform28.
/// </Summary>
Public class webform28: system. Web. UI. Page
{
Protected system. Web. UI. webcontrols. dropdownlist dropdownlist1;
Protected system. Web. UI. webcontrols. DataGrid datagrid1;
Private void page_load (Object sender, system. eventargs E)
{
// Place user code here to initialize the page
If (! Ispostback)
{
Setbind ();
Setbind2 ();
}
}
Protected void setbind ()
{
Sqlconnection conn = new sqlconnection (system. configuration. configurationsettings. deleettings ["conn"]);
Sqldataadapter da = new sqldataadapter ("select * from Stu, DEP where Stu. studepid = dep. depid", Conn );
Dataset DS = new dataset ();
Da. Fill (DS, "Table1 ");
This. datagrid1.datasource = Ds. Tables ["Table1"];
This. datagrid1.databind ();
}
Protected void setbind2 ()
{
Sqlconnection conn2 = new sqlconnection (system. configuration. configurationsettings. deleettings ["conn"]);
Sqldataadapter da2 = new sqldataadapter ("select * From Dep", conn2 );
Dataset ds2 = new dataset ();
Da2.fill (ds2, "Table1 ");
This. dropdownlist1.datasource = ds2.tables ["Table1"];
This. dropdownlist1.datatextfield = "depname ";
This. dropdownlist1.datavaluefield = "depid ";
This. dropdownlist1.databind ();
This. dropdownlist1.items. insert (0, new listitem ("select ",""));
}
Protected void setbind3 ()
{
String S = This. dropdownlist1.selectedvalue;
Sqlconnection conn = new sqlconnection (system. configuration. configurationsettings. deleettings ["conn"]);
Sqlcommand comm = new sqlcommand ();
Comm. Connection = conn;
If (s! = "")
{
Comm. commandtext = "select * from Stu, DEP where Stu. studepid = dep. depid and depid = @ depid ";
Sqlparameter parm1 = new sqlparameter ("@ depid", sqldbtype. INT );
Parm1.value = s;
Comm. Parameters. Add (parm1 );
}
Else
Comm. commandtext = "select * from Stu, DEP where Stu. studepid = dep. depid ";
Sqldataadapter da = new sqldataadapter ();
Da. selectcommand = comm;
Dataset DS = new dataset ();
Da. Fill (DS, "Table1 ");
This. datagrid1.datasource = Ds. Tables ["Table1"];
This. datagrid1.databind ();
}
# Code generated by region web Form Designer
Override protected void oninit (eventargs E)
{
//
// Codegen: This call is required by the ASP. NET web form designer.
//
Initializecomponent ();
Base. oninit (E );
}
/// <Summary>
/// The designer supports the required methods-do not use the code editor to modify
/// Content of this method.
/// </Summary>
Private void initializecomponent ()
{
This. Maid + = new system. Web. UI. webcontrols. Maid (this. Maid );
This. dropdownlist1.selectedindexchanged + = new system. eventhandler (this. dropdownlist+selectedindexchanged );
This. Load + = new system. eventhandler (this. page_load );
}
# Endregion
Private void maid (Object sender, system. Web. UI. webcontrols. datagriditemeventargs E)
{
Sqlconnection conn = new sqlconnection (system. configuration. configurationsettings. deleettings ["conn"]);
Sqldataadapter da = new sqldataadapter ("select * From Dep", Conn );
Dataset DS = new dataset ();
Da. Fill (DS, "Table1 ");
If (E. Item. itemtype = listitemtype. edititem)
{
Dropdownlist DDL = (dropdownlist) E. Item. findcontrol ("Dep ");
DDL. datasource = Ds. Tables ["Table1"];
DDL. datatextfield = "depname ";
DDL. datavaluefield = "depid ";
DDL. databind ();
DDL. Items. findbyvalue (convert. tostring (databinder. eval (E. Item. dataitem, "depid"). Selected = true; // select the database as the default value.
}
}
Protected void edit (Object sender, datagridcommandeventargs E)
{
This. datagrid1.edititemindex = E. Item. itemindex;
If (this. dropdownlist1.selectedvalue = "")
Setbind ();
Else
Setbind3 ();
}
Protected void cancel (Object sender, datagridcommandeventargs E)
{
This. Maid =-1;
If (this. dropdownlist1.selectedvalue = "")
Setbind ();
Else
Setbind3 ();
}
Protected void Update (Object sender, datagridcommandeventargs E)
{
If (E. Item. itemtype = listitemtype. edititem) // submit only after editing and pressing
{
Sqlconnection conn = new sqlconnection (system. configuration. configurationsettings. deleettings ["conn"]);
Sqlcommand comm = new sqlcommand ("Update Stu set stuname = @ name, studepid = @ depid where stuid = @ ID", Conn );
Sqlparameter parm1 = new sqlparameter ("@ name", sqldbtype. nvarchar, 50 );
Parm1.value = (textbox) E. Item. findcontrol ("name"). text;
Sqlparameter parm2 = new sqlparameter ("@ depid", sqldbtype. INT );
Parm2.value = (dropdownlist) E. Item. findcontrol ("Dep"). selectedvalue;
Sqlparameter parm3 = new sqlparameter ("@ ID", sqldbtype. INT );
Parm3.value = This. datagrid1.datakeys [E. Item. itemindex];
Comm. Parameters. Add (parm1 );
Comm. Parameters. Add (parm2 );
Comm. Parameters. Add (parm3 );
Conn. open ();
Comm. executenonquery ();
Conn. Close ();
This. Maid =-1;
If (this. dropdownlist1.selectedvalue = "")
Setbind ();
Else
Setbind3 (); // if you select to filter, use setbind3 ()
}
}
Private void dropdownlistpolicselectedindexchanged (Object sender, system. eventargs E)
{
Setbind3 ();
}
}
}
CSS:
. Border {
Background-color: # 00496c;
}
. Header {
Font-family: "", sans-serif;
Font-size: 10pt;
Font-weight: bold;
Color: # ffffff;
Background-color: #0080c0;
Text-align: center;
}
. Item {
Font-family: "", sans-serif;
Font-size: 9pt;
Font-weight: normal;
Color: #0080c0;
Background-color: # ffffff;
Text-align: center;
}
The code is relatively simple. The following is a brief description:
(1) setbind () is the basic binding; setbind2 () is the dropdownlist outside the binding; setbind3 () is the binding of the DataGrid after filtering selected in the drop-down box
(2) Here CSS is used to implement the table border using cellspacing, so this value is the Border width. In the CSS of the table border, background-color is used to describe the border color.
from: http://blog.csdn.net/LoveCherry/archive/2005/03/24/328455.aspx
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