c# - How to setup paging with Gridview and code behind (no data source) -


i looking on paging using gridview , data source set in code behind. want set queries database return 50 records @ time (about 20,000 in all). works except can't paging setup properly. think default paging work, don't see anywhere can tell gridview max number of pages show in navigation or overall number of records aside 50 knows about.

i need blog or link step step instructions on how this.

here gridview:

<asp:gridview     id="gvresults"     cellpadding="4"     headerstyle-backcolor="darkgray"     runat="server"     onpageindexchanging="gvresults_pageindexchanging"     autogeneratecolumns="false" allowpaging="true" forecolor="#333333" showheaderwhenempty="true" pagesize="50" width="100%" enablesortingandpagingcallbacks="true">     <pagersettings pagebuttoncount="10" position="topandbottom" mode="numericfirstlast" />     <alternatingrowstyle backcolor="white" />     <editrowstyle backcolor="#0a5ea7" />     <footerstyle backcolor="#507cd1" font-bold="true" forecolor="white" />     <headerstyle backcolor="#0a5ea7" font-names="" font-size="medium" forecolor="white" font-bold="true"></headerstyle>     <pagerstyle backcolor="#0a5ea7" forecolor="white" horizontalalign="center" />     <rowstyle backcolor="#eff3fb" />     <selectedrowstyle backcolor="#d1ddf1" font-bold="true" forecolor="#333333" />     <sortedascendingcellstyle backcolor="#f5f7fb" />     <sortedascendingheaderstyle backcolor="#6d95e1" />     <sorteddescendingcellstyle backcolor="#e9ebef" />     <sorteddescendingheaderstyle backcolor="#4870be" />     <columns>         <asp:hyperlinkfield headertext="item number" datatextfield="change number" datatextformatstring="{0}" datanavigateurlformatstring="./item.aspx?id={0}" datanavigateurlfields="item number" />         <asp:boundfield headertext="" datafield="attachment(s)" headerimageurl="images/paperclip1sm.png" headerstyle-horizontalalign="center">             <headerstyle horizontalalign="center"></headerstyle>         </asp:boundfield>         <asp:boundfield datafield="part" headerimageurl="images/part1sm.png" headerstyle-horizontalalign="center">             <headerstyle horizontalalign="center"></headerstyle>         </asp:boundfield>         <asp:boundfield headertext="description of change" datafield="description" />         <asp:boundfield headertext="status" datafield="status" />         <asp:boundfield headertext="reason code" datafield="reason code" />         <asp:boundfield headertext="reason" datafield="reason" />     </columns> </asp:gridview>

here query total record count:

//this total number of records.     private int getmaxrecordcount()     {         int lastrecord = 0;         string econumber = iteminput.value.toupper().trim();         string connstr = "i removed bit, work";         oracleconnection conn = new oracleconnection(connstr);         string sqlcountstring = "select count(*) table1 field1 '" + inputnumber + "%'";         conn.open();         oraclecommand cmdcount = new oraclecommand(sqlcountstring, conn);         oracledatareader countreader = cmdcount.executereader();          while (countreader.read())         {             lastrecord = int32.parse(countreader[0].tostring());             itemresults.text = "total records returned: " + lastrecord + ")";         }         conn.dispose();         return lastrecord;     }

and here code gets subset of records:

private void bindgrid(int startrecord, int endrecord)     {         try         {             othermessage.visible = false;             othermessage.forecolor = default(color);             ecogrid.visible = false;             gvresults.visible = false;             string itemnumber = ecoinput.value.toupper().trim();             string connstr = "i removed bit, work";             oracleconnection conn = new oracleconnection(connstr);             string sqlstring = @"                                 removed bit, work                                 ";             sqlstring = sqlstring + itemnumber + "%' , rownum between " + startrecord + " , " + endrecord;              conn.open();             oraclecommand cmd = new oraclecommand(sqlstring, conn);             oracledatareader reader = cmd.executereader();             datatable dt = new datatable();             dt.columns.addrange(new datacolumn[7] {                     new datacolumn("item number"),                     new datacolumn("attachment(s)"),                     new datacolumn("part"),                     new datacolumn("status"),                     new datacolumn("reason code"),                     new datacolumn("reason"),                     new datacolumn("description")                  });              while (reader.read())             {                 datarow dr = null;                 dr = dt.newrow();                 dr["item number"] = reader[0].tostring();                 string att = hasattachments(reader[0].tostring());                 dr["attachment(s)"] = att;                 dr["part"] = "";                 dr["status"] = reader[1].tostring();                 dr["reason code"] = reader[2].tostring();                 dr["reason"] = reader[3].tostring();                 dr["description"] = reader[4].tostring();                  dt.rows.add(dr);             }              conn.dispose();              if (dt.rows.count > 0)             {                 itemgrid.visible = true;                 gvresults.visible = true;                 gvresults.datasource = dt;                 gvresults.databind();             }             else             {                 itemgrid.visible = false;                  othermessage.visible = true;                 othermessage.text = "no results found.";             }         }         catch         {             itemgrid.visible = false;             othermessage.visible = true;             othermessage.forecolor = color.red;             othermessage.text = "there error processing request. please contact helpdesk additional assistance.";         }     }


Comments

Post a Comment

Popular posts from this blog

angular - Ionic slides - dynamically add slides before and after -

hi i'm using ngfor create set of 3 slides while starting in middle i'm guaranteed able slide left or right on start. when slide right can simple listen reachedend , push slide array i'm looping. but have problem adding slide beginning. if same above , use e.g. array.unshift() or spread add item beginning, view think it's on position 0 , snaps view new slide. the code below work animates slide change index 1. slide = [0,1,2] //example loop slidechanged(event) { if(this.slides.isbeginning()){ this.slide = [this.slide[0]-1, ...this.slide]; this.slides.update(); this.slides.slideto(1) } } <ion-slides [initialslide]="1" (ionslidedidchange)="slidechanged($event)"> <ion-slide *ngfor="let item of slide"> <h1>slide {{item}}</h1> </ion-slide> </ion-slides> any appreciated! you can using ionslidenextend , ionslideprevend events slides . please
Read more

minify - Minimizing css files -

i want know how css files can minimized. currently, using external sites css minifier compress css files. however, after removing whitespaces, comments, etc, file sizes reduced 10-15%. how frameworks bootstrap manage make minimized versions kilobytes. as example, css is: body { background-color: #ff0; } the reduction goes 28 bytes 22 bytes other css files have lot more characters still smaller this. actually minifying code means it's remove thing code white space characters new line characters comments block delimiters it reduces amount of code has transferred on web , speed site load fastly.but unreadable format.
Read more

Add a dynamic header in angular 2 http provider -

i have http interceptor built via tutorial https://scotch.io/@kashyapmukkamala/using-http-interceptor-with-angular2 the problem need have dynamic header changes automatically once changes 'mode' in app. service able tell interceptor change header, or have interceptor pull header (which string)from service each request. able throwing away patch method, call http.patch('new header string') set header string. call in service controls 'mode' setting. wondering if there way interceptor pull recent value service each request or if can add method http provider via interceptor? i've tried call service in interceptor each request returns undefined. because creating new instance of service or copying value before service fired , loaded/changed data. i don't want pass header string every http provider call because defeats purpose of having interceptor, id able set once changes or have provider fetch service before makes request. tl;dr : need add autom
Read more