c# - How do I update rows when clicking "update" button in web application gridview? -

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in web application asp.net, far have gridview configured can delete rows (i have primary identity(1,1) key set) , click "edit" button row editable, have no idea how rows update.

basically, after user edits textbox in web application's gridview, i'm not sure how fetch data, , write code in vb.net attach database.

here's html code gridview:

<asp:gridview id="gridview1" runat="server" autogeneratecolumns="false"              datakeynames="id" datasourceid="sqldatasource1" width="861px"              cellpadding="4" forecolor="#333333" gridlines="none" allowpaging="true"              allowsorting="true">             <alternatingrowstyle backcolor="white" />             <columns>                 <asp:commandfield showeditbutton="true" />                 <asp:boundfield datafield="id" headertext="id"                      sortexpression="id" insertvisible="false" readonly="true" />                 <asp:boundfield datafield="commission_earned" headertext="commission_earned"                      sortexpression="commission_earned" readonly="true" />                 <asp:boundfield datafield="commission_rate" headertext="commission_rate"                      sortexpression="commission_rate" />                 <asp:boundfield datafield="msrp" headertext="msrp" sortexpression="msrp" />                 <asp:boundfield datafield="sale_price" headertext="sale_price"                      sortexpression="sale_price" />                 <asp:boundfield datafield="salesperson" headertext="salesperson"                      sortexpression="salesperson" />                 <asp:boundfield datafield="vin" headertext="vin" sortexpression="vin" />                           <asp:templatefield>      <itemtemplate>          <asp:linkbutton id="linkbutton1" runat="server" text="delete" commandname="delete" commandargument='<%# eval("id") %>'></asp:linkbutton>          <asp:linkbutton id="linkbutton2" runat="server" text="edit" commandname="edit" commandargument='<%# eval("id")%>'></asp:linkbutton>          <asp:linkbutton id="linkbutton3" runat="server" text="" commandname="update" onclick = "button1_click" commandargument='<%#eval("salesperson") + "," + eval("vin") + "," + eval("sale_price") + "," + eval("msrp") + "," + eval("commission_rate") %>'></asp:linkbutton>       </itemtemplate> </asp:templatefield>             </columns>              <editrowstyle backcolor="#2461bf" />             <footerstyle backcolor="#507cd1" font-bold="true" forecolor="white" />             <headerstyle backcolor="#507cd1" font-bold="true" forecolor="white" />             <pagerstyle backcolor="#2461bf" 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" />         </asp:gridview>         <asp:sqldatasource id="sqldatasource1" runat="server"              connectionstring="<%$ connectionstrings:autodealer_matthewbuhrconnectionstring3 %>"               selectcommand="select [id], [commission earned] commission_earned, [commission rate] commission_rate, [msrp], [sale price] sale_price, [salesperson], [vin] [sales]"             deletecommand="select * sales"              updatecommand="">             <updateparameters>                 <asp:parameter name="id" type="int32" />                 <asp:parameter name="salesperson" type="string" />                 <asp:parameter name="vin" type="string" />                 <asp:parameter name="price" type="string" />                 <asp:parameter name="msrp" type="string" />                 <asp:parameter name="commissionrate" type="string" />                 <asp:parameter name="commissionearned" type="string" />             </updateparameters>          </asp:sqldatasource>

insted of adding 3 diffrent buttons, write line:

<asp:commandfield showeditbutton="true" updatetext="update" edittext="update" canceltext="cancel" controlstyle-cssclass="btn btn-blue" />

fill method

updatecommand="updae [table] set salesperson=@salesperson"


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