Data source structure with http://www.cnblogs.com/loveCherry/archive/2005/03/25/125525.html Table Dep: DepiD (Logo Primary Key), DepName (College Name) Table Stu: Stuid (Logo Primary Key), Stuname (Student Name), Studed (College ID = Table Dep.Depid) Front Desk: <% @ Page Language = "C #" CodeBehind = "Webform30.aspx.cs" autoeventwireup = "false" inherits = "9cbs.webform30"%>%>%>
Webform30 </ 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 ms_positioning = "gridLayout"> <form id = "form1" method = "post" Runat = "Server"> </ form> </ body> </ html> background: use system; use system.componentmodel; use system.data; using system.data.sqlclient; use system.drawing; Using system.web; using system.web.ssions Tate; use system.web.ui; using system.web.ui.webcontrols; using system.web.ui.htmlcontrols;</p>
<p>Namespace 9CBS {/// <summary> /// WebForm 30 summary description. /// </ summary> public class Webform30: system.Web.ui.page {dataGrid DataGrid1 = new dataGrid (); private void page_load (Object sender, system.eventargs e) {// Place user code here to initialize page CreateDataGrid ();} protected void CreateDataGrid () {DataGrid1.AutoGenerateColumns = false; DataGrid1.CssClass = "border"; DataGrid1.BorderWidth = 0; DataGrid1.CellSpacing = 1; DataGrid1.CellPadding = 5; DataGrid1.ItemStyle.CssClass = "item"; DataGrid1.HeaderStyle.CssClass = "header"; DataGrid1.DataKeyField = "stuid"; // set above DataGrid style TemplateColumn tm = new TemplateColumn (); tm.ItemTemplate = new ColumnTemplate1 (); tm.HeaderText = "name"; DataGrid1.Columns.Add (tm); // create the first template column TemplateColumn tm2 = new TemplateColumn (); tm2.ItemTemplate = new ColumnTemplate2 (); tm2.HeaderText = "College"; DataGrid1.Columns .Add (tm2); // Establish a second template column ButtonColumn bc = new buttoncolumn (); bc.buttontype = buttoncolumnpe.pushbutton; bc.commandname = "del"; bc.Text = "Delete"; DataGrid1.columns. Add (bc); // Establish a delete button column setBind (); // Plip data page.controls [1] .controls.add (datagrid1); // Add this DataGrid1} protected void setbind () {SQLConnection Conn = new SqlConnection (System.Configuration.ConfigurationSettings.AppSettings [ "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 ();}</p>
<p>Private Void DataGrid1_itemdatabase (Object Sender, System.Web.ui.WebControls.DataGriditeMeventargs E) {// The code in the example given above is the same, to the drop-down box, and select the default SQLConnection conn = new SqlConnection System.configuration.configurationSettingS.AppSettings ["conn"]); SqlDataAdapter Da = New SqlDataAdapter ("Select * from dep", conn); DataSet DS = New DataSet (); DA.FILL (DS, "Table1"); if (E.Item.itemType == ListiteMType.Item || E.Item.itemType == ListItemType.alternatingItem) {DropDownList DDL = (DropDownList) E.Item.findControl ("dep"); ddl.datasource = DS.TABLES [ "table1"]; ddl.datatextfield = "depname"; ddl.datavaluefield = "depid"; ddl.database (); ddl.items.FindByvalue (Convert.TOSTRING (DatabaseM.DataItem, "depid" .))) Selected = true;}} private void DataGrid1_ItemCommand (object source, System.Web.UI.WebControls.DataGridCommandEventArgs e) {if (e.CommandName == "del") {SqlConnection conn = new SqlConnection (System.Configuration .ConfigurationSettings.appsettings ["con n "]); SQLCOMMAND Comm = New SQLCOMMAND (" Delete from Stu Where Stuid = @ ID ", Conn); SQLParameter Parm1 = New SQLParameter (" @ ID ", SqldbType.It); Parm1.Value = this.DataGrid1.DataKeys [E.Item.itemindex]; comm.Parameters.Add (PARM1); conn.open (); comm.executenonquery (); conn.close (); setbind ();}}</p>
<p>#Region Web Form Designer Generated Code Override Protected Void OnNit (Eventargs E) {// // Codegen: This call is required for the ASP.NET Web Form Designer. // InitializeComponent (); base.onit (e);} /// <summary> /// Designer Supports the required method - Do not use the code editor to modify the // / this method. /// </ summary> private void InitializeComponent () {this.Load = new System.EventHandler (this.Page_Load); this.DataGrid1.ItemDataBound = new System.Web.UI.WebControls.DataGridItemEventHandler (this.DataGrid1_ItemDataBound) This.DataGrid1.itemCommand = new system.Web.ui.WebControls.dataGridCommandeventhandler (this.dataGrid1_itemmand); // Here's two events don't forget, because DataGrid is created in the background, these events need to write themselves , vs.net} is not created for you #endregion} public class ColumnTemplate1: ITemplate {// first column template public void InstantiateIn (Control container) {LiteralControl l = new LiteralControl (); l.DataBinding = new EventHandler (this.ondatabase); // Data Bind Container.Controls.Add (L); / / Add LiteralControl} for template columns</p>
<p>public void OnDataBinding (object sender, EventArgs e) {LiteralControl l = (LiteralControl) sender; // LiteralControl send a binding request DataGridItem container = (DataGridItem) l.NamingContainer; l.Text = ((DataRowView) container.DataItem) [ " Stuname "]. TOSTRING (); // Binding stuname field}}</p>
<p>public class ColumnTemplate2: ITemplate {// second template column public void InstantiateIn (Control container) {DropDownList dpl = new DropDownList (); dpl.ID = "dep"; container.Controls.Add (dpl); // add a ID = "Dep" drop-down box, data is bound in the DataGrid ItemDatabase}}</p></div><div class="text-center mt-3 text-grey">
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