problem in updating the gridview

Question

priyamsc 0 Light Poster

15 Years Ago

hi,
i have used gridview in asp.net 2005 wit c#.i need to update my datas.in tat i hv placed dropdownlist,checkbox controls.but its not updating the datas.when i edit the row,we have dropdownlist but not tat database value.so when i edit the row the database value should be in dropdown list.when i click update link i got this error.The GridView 'GridView1' fired event RowUpdating which wasn't handled.so pls help me to do this.
this is coding
-----------------

protected void GridView1_RowUpdated(object sender, GridViewUpdatedEventArgs e)
    {          GridViewRow gv = null;
            string k = string.Format(GridView1.Rows[gv.RowIndex].Cells[4].Text);
            Response.Write(k);
            TextBox t1, t2, t3, t4, t5,t6,t7,t8,t9,t10,t11;
            DropDownList d1, d2, d3, d4,d5;
            CheckBox cdr, cdrw, cdvdr, cdvdrw, cfdd, cinter, cwa;
            t1 = (TextBox)GridView1.Rows[gv.RowIndex].Cells[5].Controls[1];
            t2 = (TextBox)GridView1.Rows[gv.RowIndex].Cells[6].Controls[1];
            t3 = (TextBox)GridView1.Rows[gv.RowIndex].Cells[7].Controls[1];
            t4 = (TextBox)GridView1.Rows[gv.RowIndex].Cells[8].Controls[1];           
            t5 = (TextBox)GridView1.Rows[gv.RowIndex].Cells[9].Controls[1];
            t6 = (TextBox)GridView1.Rows[gv.RowIndex].Cells[10].Controls[1];
            t7 = (TextBox)GridView1.Rows[gv.RowIndex].Cells[11].Controls[1];
            t8 = (TextBox)GridView1.Rows[gv.RowIndex].Cells[18].Controls[1];
            t9 = (TextBox)GridView1.Rows[gv.RowIndex].Cells[20].Controls[1];
            t10 = (TextBox)GridView1.Rows[gv.RowIndex].Cells[21].Controls[1];
            t11 = (TextBox)GridView1.Rows[gv.RowIndex].Cells[22].Controls[1];       
                d1 = (DropDownList)GridView1.Rows[gv.RowIndex].Cells[0].Controls[0];
                d2 = (DropDownList)GridView1.Rows[gv.RowIndex].Cells[1].Controls[0];
                d3 = (DropDownList)GridView1.Rows[gv.RowIndex].Cells[2].Controls[0];
                d4 = (DropDownList)GridView1.Rows[gv.RowIndex].Cells[3].Controls[0];
                d5 = (DropDownList)GridView1.Rows[gv.RowIndex].Cells[23].Controls[0];
                    cdr =  (CheckBox)GridView1.Rows[gv.RowIndex].Cells[12].Controls[2];
                    cdrw = (CheckBox)GridView1.Rows[gv.RowIndex].Cells[13].Controls[2];
                    cdvdr =(CheckBox)GridView1.Rows[gv.RowIndex].Cells[14].Controls[2];                    cdvdrw=(CheckBox)GridView1.Rows[gv.RowIndex].Cells[15].Controls[2];
                    cfdd = (CheckBox)GridView1.Rows[gv.RowIndex].Cells[16].Controls[2];
                    cinte =(CheckBox)GridView1.Rows[gv.RowIndex].Cells[17].Controls[2];
                    cwa =  (CheckBox)GridView1.Rows[gv.RowIndex].Cells[19].Controls[2];
            int cd_r = 0, cd_rw = 0, dvd_r = 0, dvd_rw = 0, fdd = 0, inter = 0, wa = 0;
            if (cdr.Checked)
            {                cd_r = 1;            }
            if (cdrw.Checked==true)
            {                cd_rw = 1;            }
            if (cdvdr.Checked==true)
            {                dvd_r = 1;            }
            if (cdvdrw.Checked == true)
            {                dvd_rw = 1;            }
            if (cfdd.Checked == true)
            {                fdd = 1;            }
            if (cinter.Checked == true)
            {                inter = 1;            }
            if (cwa.Checked == true)
            {                wa = 1;            }      
        string upd="update reg_laptop set block='"+d1.SelectedValue+"',location='"+d2.SelectedValue+"',department='"+d3.SelectedValue +"',pcname='"+d4.SelectedValue+"',os='"+t1.Text+"',procmodel='"+t2.Text +"',procspeed='"+t3.Text+"',ram='"+t4.Text+"',harddisk='"+t5.Text+"',cpuno='"+t6.Text +"',monino='"+t7.Text +"',cd_r="+cd_r+",cd_rw="+cd_rw+",dvd_r="+dvd_r +",dvd_rw="+dvd_rw+",fdd="+fdd+",internetconnection="+inter+",dateofpurchase='"+t8.Text+"',waranty_amc="+wa+",frmdate='8/5/2003',todate='8/5/2009',compname='"+d5.SelectedValue+"',contactperson='"+t9.Text+"' where ipaddress='"+k+"'";
        cmd = new SqlCommand(upd, con);
        cmd.ExecuteNonQuery();
        Response.Write("ur datas r updated");
        GridView1.EditIndex = -1;
        binddata();         }

===========================================================

protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)    {       
        GridView1.EditIndex = e.NewEditIndex;
        binddata();    }

thank you

asp.net

3 Contributors
15 Replies
663 Views
1 Day Discussion Span
Latest Post 15 Years Ago Latest Post by priyamsc

All 15 Replies

srikanthkadem 0 Junior Poster in Training

15 Years Ago

hi,
can u try to write that whole code in row updating instead of rowupdated.

shivakanungo26 0 Newbie Poster

15 Years Ago

:) tring the code in rowupdating event

srikanthkadem 0 Junior Poster in Training

15 Years Ago

hey priya,
try like this
checkbox cb=(checkbox)gridview1.findcontrol("checkbox1");
if(cb.checked)
{
//so so
}
else
{
//so so
}
may it works...

srikanthkadem 0 Junior Poster in Training

15 Years Ago

Note:iam not intrested in case sensitivity...use proper cases as c# is case sensitive....

Reply to this topic

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.

priyamsc 0 Light Poster · Answer 1 · 2008-06-04T14:26:46+00:00

ya now i tried in updating event. its working.but again i have error .
in this line..
GridViewRow gv = null;
string k = string.Format(GridView1.Rows[gv.RowIndex].Cells[4].Text);

bec i have created gv for gridviewrow... and assigned null.
If i don't give gv =null it show an error
so pls give suggestion for rectify this error.

priyamsc 0 Light Poster · Answer 2 · 2008-06-04T15:08:11+00:00

hi ,
instead of gv i use e.so i rectified tat error.
but one more error is
cdr = (CheckBox)GridView1.Rows[gv.RowIndex].Cells[12].Controls[2];
because in database i used bit value.tat is 0 or 1.and if it is in grid view then it shows No or Yes. when i edit tat it shows chek box .
so when i check the check box 1 should be stored in database
so pls help me to do this

thanking you

priyamsc 0 Light Poster · Answer 3 · 2008-06-04T16:18:34+00:00

ya. i gave like this as you told.
cdr = (CheckBox)GridView1.FindControl("chk_cdr");
but its showing an error.when i trace it value cdr = null
and i got this error Object reference not set to an instance of an object
how can i get the 1 when i check the checkbox

i tried in checkedchanged event..tat event also is not working. shows the same error

thank you sir,

srikanthkadem 0 Junior Poster in Training · Answer 4 · 2008-06-04T16:29:47+00:00

hey priya,
can u ones post the .aspx page code...i will check 1s so that i will get some idea....

priyamsc 0 Light Poster · Answer 5 · 2008-06-04T16:39:54+00:00

Ya , this is aspx code sir,
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="reg_editlaptop.aspx.cs" Inherits="reg_editlaptop" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
 <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" BackColor="LightGoldenrodYellow"
BorderColor="Tan" BorderWidth="1px" CellPadding="2" ForeColor="Black" GridLines="None"
Height="219px" Width="1367px" AllowSorting="True" EnableTheming="True" OnRowEditing="GridView1_RowEditing" OnRowCancelingEdit="GridView1_RowCancelingEdit" OnRowCommand="GridView1_RowCommand" OnRowUpdating="GridView1_RowUpdating">
<FooterStyle BackColor="Tan" />
<Columns>
<asp:TemplateField HeaderText="Block">
<EditItemTemplate>
 
<asp:DropDownList ID="ddl_block" runat="server" AutoPostBack="True" Width="130px" DataTextField ="descriptions" DataValueField ="sid" DataSource="<%#loadblock()%>" AppendDataBoundItems="True" OnSelectedIndexChanged="ddl_block_SelectedIndexChanged">
<asp:ListItem>--------Select--------</asp:ListItem>
</asp:DropDownList>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("block") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Location">
<EditItemTemplate>
 <asp:DropDownList ID="ddl_loc" runat="server" DataSource ="<%#loadloc()%>" DataTextField ="descriptions" DataValueField ="sid" AppendDataBoundItems="True" AutoPostBack="True"
Width="130px">
<asp:ListItem>--------Select--------</asp:ListItem>
</asp:DropDownList>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<%# Bind("location") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Department">
<EditItemTemplate>
 <asp:DropDownList ID="ddl_dep" runat="server" DataSource ="<%#loaddep()%>" DataTextField="descriptions" DataValueField ="sid" AppendDataBoundItems="True" AutoPostBack="True"
Width="130px">
<asp:ListItem>--------Select--------</asp:ListItem>
</asp:DropDownList>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label3" runat="server" Text='<%# Bind("department") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Sys-Name">
<EditItemTemplate>
<asp:DropDownList ID="DropDownList1" runat="server" AppendDataBoundItems="true" DataSource="<%#loadpc()%>" DataTextField="descriptions" DataValueField="sid" AutoPostBack="True" Width="130px">
<asp:ListItem>--------Select--------</asp:ListItem>
</asp:DropDownList>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label4" runat="server" Text='<%# Bind("pcname") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="ipaddress" HeaderText="IP-Address" ReadOnly="True" />
<asp:BoundField DataField="os" HeaderText="OS" />
<asp:BoundField DataField="procmodel" HeaderText="Processor Model" />
<asp:BoundField DataField="procspeed" HeaderText="Processor Speed" />
<asp:BoundField DataField="ram" HeaderText="Ram" />
<asp:BoundField DataField="harddisk" HeaderText="Hard Disk" />
<asp:BoundField DataField="cpuno" HeaderText="Cpu No." />
<asp:BoundField DataField="monino" HeaderText="Monitor No." />
<asp:TemplateField HeaderText="CD-R">
<EditItemTemplate>
<asp:CheckBox ID="chk_cdr" runat="server" OnCheckedChanged="chk_cdr_CheckedChanged" />
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label6" runat="server" Text='<%# Bind("cd_r") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="CD_RW">
<EditItemTemplate>
<asp:CheckBox ID="chk_cdrw" runat="server" />
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label7" runat="server" Text='<%# Bind("cd_rw") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="DVD_R">
<EditItemTemplate>
<asp:CheckBox ID="chk_dvdr" runat="server" />
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label8" runat="server" Text='<%# Bind("dvd_r") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="DVD_RW">
<EditItemTemplate>
<asp:CheckBox ID="chk_dvdrw" runat="server" />
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label9" runat="server" Text='<%# Bind("dvd_rw") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="FDD">
<EditItemTemplate>
<asp:CheckBox ID="chk_fdd" runat="server" />
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label10" runat="server" Text='<%# Bind("fdd") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Internet">
<EditItemTemplate>
<asp:CheckBox ID="chk_ineter" runat="server" />
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label11" runat="server" Text='<%# Bind("internetconnection") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="dateofpurchase" HeaderText="DOP" />
<asp:TemplateField HeaderText="W/A">
<EditItemTemplate>
<asp:CheckBox ID="chk_wa" runat="server" />
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label12" runat="server" Text='<%# Bind("wa") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="frmdate" HeaderText="From Date" />
<asp:BoundField DataField="todate" HeaderText="To Date" />
<asp:TemplateField HeaderText="Company Name">
<EditItemTemplate>
<asp:DropDownList ID="ddl_compname" runat="server" AutoPostBack="True" Width="123px">
<asp:ListItem>---------Select--------</asp:ListItem>
<asp:ListItem>Hcl</asp:ListItem>
<asp:ListItem>Accel</asp:ListItem>
<asp:ListItem>MasterMind</asp:ListItem>
<asp:ListItem>Dell</asp:ListItem>
<asp:ListItem>logitech</asp:ListItem>
<asp:ListItem>Samsung</asp:ListItem>
</asp:DropDownList>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label5" runat="server" Text='<%# Bind("compname") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="contactperson" HeaderText="Contact Person" />
<asp:CommandField ShowEditButton="True" />
</Columns>
<PagerStyle BackColor="PaleGoldenrod" ForeColor="DarkSlateBlue" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="DarkSlateBlue" ForeColor="GhostWhite" />
<HeaderStyle BackColor="Tan" Font-Bold="True" />
<AlternatingRowStyle BackColor="PaleGoldenrod" />
</asp:GridView>
 <br />

</div>
</form>

</body>
</html>
thanking you,

priyamsc 0 Light Poster · Answer 6 · 2008-06-05T09:10:01+00:00

hi sir,
Hve u found the ans
if so pls inform me as soon as possible.
thanking you,

srikanthkadem 0 Junior Poster in Training · Answer 7 · 2008-06-05T11:04:22+00:00

hey,
everything is fine.in that code....in edit mode did u get the checkboxes in interface...did u write ur code in rowupdating event only..did u declare cdr as checkbox object globally...?check these things......

priyamsc 0 Light Poster · Answer 8 · 2008-06-05T11:23:19+00:00

hey,
everything is fine.in that code....in edit mode did u get the checkboxes in interface...did u write ur code in rowupdating event only..did u declare cdr as checkbox object globally...?check these things......

ya i hav writen al as u mentioned.the problem is
cdrw = (CheckBox)GridView1.FindControl("chk_cdrw");
here the check box chk_cdrw value doesnt set for the varibale cdrw.. it shows null value when i trace the codings
and how to get the checkbox value bec it doesnt know how to get value whether the check box is checked or not
so if u knw just infrm me

Thank you so much for helping til now...

srikanthkadem 0 Junior Poster in Training · Answer 9 · 2008-06-05T11:35:12+00:00

hey priya,
first dont say sir.
second to get checkbox value first u need to get the checkbox reference that ur not getting.(u r getting null there).ones u have reference to that control ..then u can check the value simply by...

cdr.Checked property..which returns boolean value..if checked it returns true..otherwise false....

hope its useful.....

priyamsc 0 Light Poster · Answer 10 · 2008-06-05T12:01:24+00:00

hey priya,
first dont say sir.
second to get checkbox value first u need to get the checkbox reference that ur not getting.(u r getting null there).ones u have reference to that control ..then u can check the value simply by...
cdr.Checked property..which returns boolean value..if checked it returns true..otherwise false....
hope its useful.....

cdr = new CheckBox();
cdr = ((CheckBox)GridView1.FindControl("chk_cdr"));
hey like that is wat i created the refre for cdr. i do no whet its right so can u help me how to create

priyamsc 0 Light Poster · Answer 11 · 2008-06-05T13:11:24+00:00

cdr = new CheckBox();
cdr = ((CheckBox)GridView1.FindControl("chk_cdr"));
hey like that is wat i created the refre for cdr. i do no whet its right so can u help me how to create

I got the answer properly.its updating nicely. thanks a lot
but when i edit the gridview , if the colum has yes value then the check box shud be cheked ...how to do tat...

problem in updating the gridview

Recommended Answers Collapse Answers

All 15 Replies

Recommended Answers