Develop Reference

How to calculate all rows in a GridView in a single button click

I have a GridView in which I'm letting users edit previously generated estimates. Everything works fine till I hit recalculate button but after that, all the row values go haywire.
Below is a screenshot of the layout for your reference.
In that, All the details are being fetched from database and few of them are editable and after changing the values, below there is a refresh button which I'm using to recalculate. but my loop is causing them to calculate incorrectly. Please help me rectify my mistake.
below is my aspx code:
<div class="card-body">
<div class="row">
<div class="col-md-12">
<asp:GridView ID="grdPurchaseBill" runat="server" CssClass="table table-bordered table-responsive table-sm" AutoGenerateColumns="False" ShowFooter="false">
<Columns>
<asp:TemplateField HeaderText="Product" ItemStyle-Wrap="false" ControlStyle-Width="100%" ItemStyle-Width="100%">
<ItemTemplate>
<asp:TextBox ID="txtProduct" runat="server" CssClass="form-control form-control-sm" Width="100%" Style="width: 100%;" AutoCompleteType="Disabled" autocomplete="off" Text='<%# Eval("product") %>'></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Weight" ItemStyle-Wrap="false" HeaderStyle-Wrap="false">
<ItemTemplate>
<asp:TextBox ID="txtWeight" runat="server" CssClass="form-control form-control-sm" Text='<%# Eval("weight") %>' Width="100%" Style="width: 100%;"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="# of Bags" ItemStyle-Wrap="false" ControlStyle-Width="100%" HeaderStyle-Wrap="false">
<ItemTemplate>
<asp:TextBox ID="txtBags" runat="server" CssClass="form-control form-control-sm" Text='<%# Eval("bags") %>' Width="100%" Style="width: 100%;"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Shortage %" ItemStyle-Wrap="false" ControlStyle-Width="100%" HeaderStyle-Wrap="false">
<ItemTemplate>
<asp:TextBox ID="txtShortagePercent" runat="server" CssClass="form-control form-control-sm" Text='<%# Eval("shortage_percent") %>' Width="100%" Style="width: 100%;"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Shortage" ItemStyle-Wrap="false" ControlStyle-Width="100%" HeaderStyle-Wrap="false">
<ItemTemplate>
<asp:TextBox ID="txtShortage" runat="server" CssClass="form-control form-control-sm" Text='<%# Eval("shortage") %>' Width="100%" Style="width: 100%;" Enabled="false"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Net Weight" ItemStyle-Wrap="false" ControlStyle-Width="100%" HeaderStyle-Wrap="false">
<ItemTemplate>
<asp:TextBox ID="txtNetWeight" runat="server" CssClass="form-control form-control-sm" Text='<%# Eval("net_weight") %>' Width="100%" Style="width: 100%;" Enabled="false"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Unit Price" ItemStyle-Wrap="false" HeaderStyle-Wrap="false" ControlStyle-Width="100%">
<ItemTemplate>
<asp:TextBox ID="txtRate" runat="server" CssClass="form-control form-control-sm" Text='<%# Eval("rate") %>' Width="100%" Style="width: 100%;"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Sub-Total" ItemStyle-Wrap="false" HeaderStyle-Wrap="false" ControlStyle-Width="100%">
<ItemTemplate>
<asp:TextBox ID="txtSubTotal" runat="server" CssClass="form-control form-control-sm" Text='<%# Eval("sub_total") %>' Width="100%" Style="width: 100%;" Enabled="false"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Hamali %" ItemStyle-Wrap="false" HeaderStyle-Wrap="false" ControlStyle-Width="100%">
<ItemTemplate>
<asp:TextBox ID="txtHamali" runat="server" CssClass="form-control form-control-sm" Text='<%# Eval("hamali_percent") %>' Width="100%" Style="width: 100%;"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Hamali Amt" ItemStyle-Wrap="false" HeaderStyle-Wrap="false" ControlStyle-Width="100%">
<ItemTemplate>
<asp:TextBox ID="txtHamaliAmount" runat="server" CssClass="form-control form-control-sm" Text='<%# Eval("hamali") %>' Width="100%" Style="width: 100%;" Enabled="false"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Driver Comm. " ItemStyle-Wrap="false" HeaderStyle-Wrap="false" ControlStyle-Width="100%">
<ItemTemplate>
<asp:TextBox ID="txtDriverCommission" runat="server" CssClass="form-control form-control-sm" Text='<%# Eval("driver_commission") %>' Width="100%" Style="width: 100%;"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Net Amt" ItemStyle-Wrap="false" ControlStyle-Width="100%" HeaderStyle-Wrap="false">
<ItemTemplate>
<asp:TextBox ID="txtNetAmount" runat="server" CssClass="form-control form-control-sm" Enabled="false" Text='<%# Eval("net_amount") %>' Width="100%" Style="width: 100%;"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
<div class="col-md-3">
<div class="form-group">
<label>Bill Date</label>
<div class="input-group margin input-group-sm">
<asp:TextBox ID="txtBDate" runat="server" CssClass="form-control form-control-sm" TabIndex="1" AutoCompleteType="Disabled" autocomplete="off"></asp:TextBox>
<ajax:CalendarExtender ID="ce1" runat="server" TargetControlID="txtBDate" Format="dd-MM-yyyy" />
<span class="input-group-btn">
<span class="fa fa-times"></span>
</span>
</div>
</div>
</div>
<div class="col-md-3">
<div class="form-group">
<label>Name</label>
<div class="input-group input-group-sm">
<asp:TextBox ID="txtcname" runat="server" CssClass="form-control form-control-sm" TabIndex="2" CausesValidation="True" AutoCompleteType="Disabled" autocomplete="off"></asp:TextBox>
<asp:HiddenField ID="hfCustomerId" runat="server" />
</div>
</div>
</div>
<div class="col-md-3">
<div class="form-group">
<label>Phone</label>
<asp:TextBox ID="txtcmobile" runat="server" CssClass="form-control form-control-sm" TabIndex="3" AutoCompleteType="Disabled" autocomplete="off"></asp:TextBox>
</div>
</div>
<div class="col-md-3">
<div class="form-group">
<label>Address</label>
<asp:TextBox ID="txtcaddress" runat="server" TextMode="MultiLine" TabIndex="6" CssClass="form-control form-control-sm"></asp:TextBox>
</div>
</div>
<div class="col-md-3">
<div class="form-group">
<label>Lorry Freight</label>
<asp:TextBox ID="txtLorryFreight" runat="server" TabIndex="6" CssClass="form-control form-control-sm"></asp:TextBox>
</div>
</div>
<div class="col-md-3">
<div class="form-group">
<label>Remarks</label>
<asp:TextBox ID="txtRemarks" runat="server" TabIndex="6" CssClass="form-control form-control-sm" TextMode="MultiLine"></asp:TextBox>
</div>
</div>
<div class="col-md-3">
<div class="form-group">
<label>Total Amount</label>
<asp:Label ID="lblTotal" runat="server" CssClass="form-control form-control-sm lblTotal" Text="0" ForeColor="Blue" BackColor="#DEE2E6"></asp:Label>
</div>
</div>
<div class="col-md-3">
<div class="form-group">
<label>Payable Amount</label>
<asp:Label ID="lblPayableAmt" runat="server" CssClass="form-control form-control-sm lblPayableAmt" Text="0" ForeColor="Blue" BackColor="#DEE2E6"></asp:Label>
</div>
</div>
<div class="col-md-3">
<div class="form-group">
<label>Paid Amount</label>
<asp:TextBox ID="txtPaidAmt" runat="server" CssClass="form-control form-control-sm txtPaidAmt" OnTextChanged="CalculatePaidAmount" AutoPostBack="true" TabIndex="8" ForeColor="Blue" Text="0"></asp:TextBox>
</div>
</div>
<div class="col-md-3">
<div class="form-group">
<label>Balance Amount</label>
<div class="input-group input-group-sm">
<label id="lblBalAmt" runat="server" class="form-control form-control-sm lblBalAmt" style="color: red; background-color: #DEE2E6;">0</label>
<span class="input-group-append">
<asp:LinkButton ID="lnkPayable" runat="server" OnClick="ReCalculate" CssClass="btn btn-outline-success btn-flat" Text="" TabIndex="9" CausesValidation="false"><i class="fa fa-sync"></i></asp:LinkButton>
</span>
</div>
</div>
</div>
</div>
</div>
And my aspx.cs code:
protected void GetBillDetails()
{
string query = "select * from estimates where bno='" + Request.QueryString["bno"].ToString() + "';";
grdPurchaseBill.DataSource = dal.GetData(query);
grdPurchaseBill.DataBind();
using (SqlConnection con = new SqlConnection(cm.constring))
{
con.Open();
using (SqlCommand cmd = new SqlCommand(query, con))
{
using (SqlDataReader dr = cmd.ExecuteReader())
{
while (dr.Read())
{
txtBDate.Text = dr["bill_date"].ToString();
txtcname.Text = dr["name"].ToString();
txtcmobile.Text = dr["mobileno"].ToString();
txtcaddress.Text = dr["address"].ToString();
txtLorryFreight.Text = dr["lorry_freight"].ToString();
txtRemarks.Text = dr["remarks"].ToString();
lblTotal.Text = dr["grand_total"].ToString();
lblPayableAmt.Text = dr["payable_amount"].ToString();
txtPaidAmt.Text = dr["paid_amount"].ToString();
lblBalAmt.InnerText = dr["balance_amount"].ToString();
bno.InnerText = Request.QueryString["bno"].ToString();
}
}
}
con.Close();
}
}
protected void ReCalculate(object sender, EventArgs e)
{
decimal PayableAmount = 0, PaidAmount = !string.IsNullOrEmpty(txtPaidAmt.Text) ? Convert.ToDecimal(txtPaidAmt.Text) : 0, NetWeight = 0, SubTotal = 0, NetAmount = 0;
foreach (GridViewRow Row in grdPurchaseBill.Rows)
{
TextBox txtProduct = Row.FindControl("txtProduct") as TextBox;
TextBox txtWeight = Row.FindControl("txtWeight") as TextBox;
TextBox txtBags = Row.FindControl("txtBags") as TextBox;
TextBox txtShortagePercent = Row.FindControl("txtShortagePercent") as TextBox;
TextBox txtShortage = Row.FindControl("txtShortage") as TextBox;
TextBox txtNetWeight = Row.FindControl("txtNetWeight") as TextBox;
TextBox txtRate = Row.FindControl("txtRate") as TextBox;
TextBox txtSubTotal = Row.FindControl("txtSubTotal") as TextBox;
TextBox txtHamali = Row.FindControl("txtHamali") as TextBox;
TextBox txtHamaliAmount = Row.FindControl("txtHamaliAmount") as TextBox;
TextBox txtDriverCommission = Row.FindControl("txtDriverCommission") as TextBox;
TextBox txtNetAmount = Row.FindControl("txtNetAmount") as TextBox;
Control txtShortagePercent_ctrl = Row.FindControl("txtShortagePercent") as TextBox;
if (txtShortagePercent_ctrl != null)
{
txtShortage.Text = (Convert.ToDecimal(txtWeight.Text) - (Convert.ToDecimal(txtWeight.Text) - (Convert.ToDecimal(txtWeight.Text)) * (Convert.ToDecimal(txtShortage.Text) / 100))).ToString("#0.00");
//txtHamaliAmount.Text = (calculateHamali(Convert.ToDecimal(txtWeight.Text), Convert.ToDecimal(txtHamali.Text))).ToString("#0.00");
decimal TotalHamali = Convert.ToDecimal(txtHamali.Text) > 0 ? ((Convert.ToDecimal(txtWeight.Text) / 100) * Convert.ToDecimal(txtHamali.Text)) : 0;
NetAmount += ((Convert.ToDecimal(txtSubTotal.Text) - TotalHamali));// + Convert.ToDecimal(txtDriverCommission.Text)
txtNetAmount.Text = NetAmount.ToString("#0.00");
txtHamaliAmount.Text = TotalHamali.ToString("#0.00");
NetWeight += (Convert.ToDecimal(txtWeight.Text) - (Convert.ToDecimal(txtWeight.Text) * Convert.ToDecimal(txtShortage.Text) / 100));
txtNetWeight.Text = NetWeight.ToString("#0.00");
txtShortage.Text = (Convert.ToDecimal(txtWeight.Text) - (Convert.ToDecimal(txtWeight.Text) - (Convert.ToDecimal(txtWeight.Text) * Convert.ToDecimal(txtShortage.Text) / 100))).ToString();
SubTotal += (Convert.ToDecimal(txtNetWeight.Text) * Convert.ToDecimal(txtRate.Text));
txtSubTotal.Text = SubTotal.ToString("#0.00");
TextBox totamt = Row.FindControl("txtNetAmount") as TextBox;
PayableAmount += Convert.ToDecimal(!string.IsNullOrEmpty(totamt.Text) ? totamt.Text : "0");
}
}
lblTotal.Text = (PayableAmount).ToString("#0.00");
lblPayableAmt.Text = (PayableAmount - Convert.ToDecimal(!string.IsNullOrEmpty(txtLorryFreight.Text) ? txtLorryFreight.Text : "0")).ToString("#0.00");
lblBalAmt.InnerText = (PaidAmount > 0 ? Convert.ToDecimal(lblPayableAmt.Text) - PaidAmount : Convert.ToDecimal(lblPayableAmt.Text) - 0).ToString("#0.00");
}

ItemDataBound slowing my page rendering

1My first question ever here, forgive if I am not fluent in tech language because I am a self taught developer from deep Africa Mozambique, thanks to this site.
My question is I have a
public void topicView_ItemDataBound(object sender,e)
In my code behind for a particular aspx page with a repeater, that receives its info from a datatable (if my terminology is correct.) The ItemDataBound event is to arrange my controls in a repeater for the purpose of hiding, disabling and showing other controls according to the determined criterias. Now I have noticed that the ItemDataBound event is slowing my page load time by some 20 to 40 seconds which is really bad, even on post back. When i remove the ItemDataBound events. I am running smoothly. But i can't work with out the ItemDataBound event since its the only way i know how to arrange a repeater with alternating conditions. Is this a common problem with a quick answer or should i post my full code?? this only happens on 2 pages with this event. I am using c# if thats of any help. net.4.5
public void topicView_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
// Show or hid div here
HiddenField MediaType = (HiddenField)e.Item.FindControl("MediaType");
HiddenField PageAdmin = (HiddenField)e.Item.FindControl("PageAdmin");
HiddenField f1 = (HiddenField)e.Item.FindControl("F1");
HiddenField PP = (HiddenField)e.Item.FindControl("PP");
HiddenField isread= (HiddenField)e.Item.FindControl("isread");
HiddenField tread = (HiddenField)e.Item.FindControl("tread");
// Label Label2 = (Label)e.Item.FindControl("Label2");
// Label2.Text = myDDL.Value;
System.Web.UI.HtmlControls.HtmlContainerControl image_video = (System.Web.UI.HtmlControls.HtmlContainerControl)e.Item.FindControl("image_video");
System.Web.UI.HtmlControls.HtmlContainerControl image_pic = (System.Web.UI.HtmlControls.HtmlContainerControl)e.Item.FindControl("image_pic");
System.Web.UI.HtmlControls.HtmlContainerControl PP1 = (System.Web.UI.HtmlControls.HtmlContainerControl)e.Item.FindControl("PP1");
System.Web.UI.HtmlControls.HtmlContainerControl userpic = (System.Web.UI.HtmlControls.HtmlContainerControl)e.Item.FindControl("userpic");
System.Web.UI.HtmlControls.HtmlContainerControl compic = (System.Web.UI.HtmlControls.HtmlContainerControl)e.Item.FindControl("compic");
System.Web.UI.HtmlControls.HtmlContainerControl userpic2 = (System.Web.UI.HtmlControls.HtmlContainerControl)e.Item.FindControl("userpic2");
System.Web.UI.HtmlControls.HtmlContainerControl compic2 = (System.Web.UI.HtmlControls.HtmlContainerControl)e.Item.FindControl("compic2");
System.Web.UI.HtmlControls.HtmlContainerControl pf = (System.Web.UI.HtmlControls.HtmlContainerControl)e.Item.FindControl("pf");
System.Web.UI.HtmlControls.HtmlContainerControl attach = (System.Web.UI.HtmlControls.HtmlContainerControl)e.Item.FindControl("attach");
LinkButton LinkButton3 = (LinkButton)e.Item.FindControl("LinkButton3");
LinkButton LinkButton1 = (LinkButton)e.Item.FindControl("LinkButton1");
Label Label4 = (Label)e.Item.FindControl("Label4");
Label Label10 = (Label)e.Item.FindControl("Label10");
System.Web.UI.WebControls.Image readsign = (System.Web.UI.WebControls.Image)e.Item.FindControl("readsign");
System.Web.UI.WebControls.Image Image2 = (System.Web.UI.WebControls.Image)e.Item.FindControl("Image2");
if (MediaType.Value == "video")
{
image_video.Visible = false;
image_pic.Visible = true;
Image2.ImageUrl = "~/images/readmail.png";
}
if (MediaType.Value == "image")
{
image_video.Visible = true;
image_pic.Visible = false;
}
if (MediaType.Value == "" ) { attach.Visible = false; } else { attach.Visible = true; }
if (PageAdmin.Value == "False")
{
compic.Visible = false;
userpic.Visible = true;
userpic2.Visible = true;
compic2.Visible = false;
}
if (PageAdmin.Value == "True")
{
userpic.Visible = false;
compic.Visible = true;
userpic2.Visible = false;
compic2.Visible = true;
}
if (isread.Value == "True")
{
readsign.ImageUrl = "~/images/readmail.png";
Label4.Text = "foi lido ";
Label10.Text = tread.Value;
}
}
}
and my aspx code for the repeater:
<asp:Repeater ID="Repeater1" runat="server" DataSourceID="SqlDataSource1"
OnItemDataBound="topicView_ItemDataBound"><ItemTemplate>
<div id="messages" style="margin-bottom: 10px">
<asp:HiddenField ID="Status" runat="server"
Value='<%#""+Eval("Isreplyed") %>' />
<asp:HiddenField ID="Pageadmin" runat="server"
Value='<%#""+Eval("PageAdmin") %>'/>
<asp:HiddenField ID="MediaType" runat="server"
Value='<%#""+Eval("MediaType") %>' />
<asp:HiddenField ID="isread" runat="server" Value='<%#""+Eval("Isread")
%>' />
<asp:HiddenField ID="tread" runat="server" Value='<%#""+Eval("tread","
{0:d / MM " + "#" + " HH:mm}") %>' />
<div id="Omsg" style="padding: 5px; border: thin solid #FFFFFF; box-
shadow:rgba(255, 255, 255,0.9) 0 0 7px; background-color: #FFFFFF;border-
radius:5px; " >
<table style="width: 100%; text-align: left; margin-left: 0px;">
<tr><td colspan="2">
<asp:Image ID="readsign" runat="server" Height="25" Width="25"
ImageUrl="~/images/newmail.png" />
<asp:Label ID="Label4" runat="server" Text='<%# ""+Eval("Isreplyed")
%>' Font-Size="X-Small" ForeColor="#999999"></asp:Label>
<asp:Label ID="Label10" runat="server" Text='<%#""+Eval("datesent","{0:d /
MM " + "#" + " HH:mm}") %>' Font-Size="X-Small" ForeColor="#999999">
</asp:Label>
</td></tr>
<tr>
<td style="width: 66px; text-align: left;"><a id="pps" ><div
id="compic" ClientIDMode="Static" runat="server"><img id="PP1" alt=""
class="img-rounded" src='<%#"/ProfilePictures/"+Eval("logo") %>'
style="width: 50px; height: 50px" /></div><input id="Hidden2" type="hidden"
runat="server" value='<%#"/ProfilePictures/"+Eval("logo") %>' /></a>
<div id="userpic" clientidmode="Static" runat="server">
<img alt="" class="img-circle"
src='<%#"/ProfilePictures/"+Eval("ProfilePicture") %>' style="width: 50px;
height: 50px" />
</div><input id="Hidden3" type="hidden" runat="server"
value='<%#"/ProfilePictures/"+Eval("ProfilePicture") %>' />
</td>
<td style="line-height: 15px"> <div id="compic2"
ClientIDMode="Static" runat="server"> <a href='<%#"/Landing.aspx?
Restid="+Eval("id") %>' ><asp:Label ID="Label2" class="head" runat="server"
Text='<%# ""+Eval("name") %>' Font-Size="Medium" ForeColor="#B9A47B">
</asp:Label> </a><a/><br/>
<asp:Label ID="CName" runat="server"
Text='<%#""+Eval("slogan") %>' Font-Size="Smaller"></asp:Label>. ...</div>
<div id="userpic2" ClientIDMode="Static"
runat="server"><a href='<%#"/Landing.aspx?Restid="+Eval("Username") %>' >
<asp:Label ID="Label8" class="head" runat="server"
Text='<%#""+Eval("Username") %>' Font-Size="Large" ForeColor="#B9A47B">
</asp:Label> <a/><br/>
<asp:Label ID="Label9" runat="server"
Text='<%#""+Eval("Job") %>' Font-Size="Smaller"></asp:Label></a>
<br />
<a/>
<a href='<%#"notificationmaster.aspx?BlogId="+Eval("Blogid") %>'> <asp:Label
ID="Label5" runat="server" Text='<%# "Respondendo à publicação :
"+Eval("BlogTitle") %>' Font-Size="smaller" ForeColor="#B9A47B"></asp:Label>
</a><br/>
</div>
<a/><span style="font-size: x-small; color: #999999">
enviado : </span><asp:Label ID="Label3" runat="server"
Text='<%#""+Eval("datesent","{0:d MMMM yyyy - HH:mm}") %>' Font-Size="X-
Small" ForeColor="#999999"></asp:Label></a>
<br />
<div id="attach" ClientIDMode="Static" runat="server" >
<asp:Label ID="Label17" runat="server" Text="Esta mensagem tem anexo"
ForeColor="#999999" Font-Size="X-Small" Font-Underline="True">
</asp:Label> <img alt="" src="images/attach.png" style="width: 20px;
height: 20px" /></div>
</td>
</tr>
<tr>
<td colspan="2">
<br/>
<div id="msgbody" style="display: none">
<asp:Label ID="Label1" runat="server" Text='<%#""+Eval("mbody") %>'>
</asp:Label><br/>
<div id="image_pic" ClientIDMode="Static" runat="server" >
<asp:HiddenField ID="HiddenField1" runat="server"
Value='<%#"/PostImages/"+Eval("image") %>' />
<asp:Image ID="Image1" class="img-thumbnail" ClientIDMode="Static"
runat="server" ImageUrl='<%#"/PostImages/"+Eval("image") %>' alt="Broken"
Width="100%" />
</div>
<div id="image_video" runat="server" onclick="AddView" >
<video id="PostVedio" runat="server" controls
poster="/images/chimoioonline.png" src='<%#"/video/"+Eval("video") %>'
style="width: 100%">
<source src="demo.mp4" type="video/mp4" />
<source src="demo.webm" type="video/webm"/>
<source src="demo.ogv" type="video/ogg"/>
<source src="demo.ogv" type="video/avi"/>
<p>Fallback code if video isn't supported</p>/
</video></div></div>
</td>
</tr>
<tr>
<td colspan="2" style="text-align: right">
<hr style="padding: 2px; margin: 5px" />
<div id="deletm" style="display: inline-block">
<input id="Hidden1" type="hidden" runat="server"
value='<%#Eval("id")%>' />
<asp:LinkButton ID="LinkButton3" runat="server" CssClass="btn"
onclick="pmdelet" BorderColor="#CCCCCC" BorderWidth="1px"><img
src="/images/delete.png" alt="" style=" height: 15px" />
</asp:LinkButton> <br />
</div>
<div id="sendpm" style="display: inline-block">
<input id="mido" type="hidden" runat="server"
value='<%#Eval("id")%>' />
<input id="Hidden4" type="hidden" runat="server"
value='<%#Eval("BlogId")%>' />
<input id="sender2" type="hidden" runat="server"
value='<%#Eval("sender")%>' />
<asp:LinkButton ID="LinkButton1" runat="server" CssClass="btn"
BorderColor="#CCCCCC" BorderWidth="1px" OnClientClick=""
PostBackUrl='<%#"PMS.aspx?id=" + Eval("id") + "&BlogId=" + Eval("BlogId")+
"&sender=" + Eval("sender")%>' ><img src="images/pvtemail.png" alt=""
style=" height: 15px" /></asp:LinkButton>
</div>
<div id="read" style="display: inline-block">
<input id="H5" type="hidden" runat="server"
value='<%#Eval("id")%>' />
<input id="H7" type="hidden" runat="server"
value='<%#"/ProfilePictures/"+Eval("logo") %>' />
<input id="H8" type="hidden" runat="server"
value='<%#"/ProfilePictures/"+Eval("ProfilePicture") %>' />
<input id="H6" type="hidden" runat="server"
value='<%#Eval("Isreplyed")%>' />
<input id="H14" type="hidden" runat="server"
value='<%#Eval("Username")%>' />
<input id="H10" type="hidden" runat="server"
value='<%#Eval("name")%>' />
<input id="H13" type="hidden" runat="server"
value='<%#Eval("Subject")%>' />
<input id="H9" type="hidden" runat="server"
value='<%#Eval("BlogTitle")%>' />
<input id="H11" type="hidden" runat="server"
value='<%#Eval("datesent","{0:d / MM " + "#" + " HH:mm}")%>' />
<input id="H12" type="hidden" runat="server"
value='<%#Eval("mbody")%>' />
<input id="v5" type="hidden" runat="server" value='<%#
Eval("video")%>' />
<input id="p5" type="hidden" runat="server"
value='<%#Eval("image")%>' />
<input id="sender" type="hidden" runat="server"
value='<%#Eval("sender")%>' />
<input id="Hidden5" type="hidden" runat="server"
value='<%#Eval("Blogid")%>' />
<input id="PageAdmin2" type="hidden" runat="server"
value='<%#Eval("PageAdmin")%>' />
<asp:LinkButton ID="LinkButton2" runat="server" CssClass="btn"
BorderColor="#CCCCCC" BorderWidth="1px" OnClientClick="return false"><img
src="/images/read2.png" alt="" style=" height:15px" /></asp:LinkButton>
</div>
</td>
</tr>
</table>
</div>
<div id="Rmsg">
</div>
</div>
</ItemTemplate></asp:Repeater>
My Server profiler screen shot

This is not really an answer, but more a way for you to delve deeper into whats the problem. (And it's to long for a comment)
First of all you need to make sure you have SQL server managment tools installed, in particular you need the tool called SQL server profiler.
In profiler you go to "file" "new trace" and connect to you SQL server.
In the Trace properties you select only "RPC:completed" and "SQL:BatchCompleted".
Now you can run your aspx page, and you should se all SQL queries generated by the page in the profiler. There are two things you should look out for.
First of all, look for long running queries. The duration column is in MS and you should not have anyone longer than 1000ms.
Secondly, the number of queries run when the page is run. A normal page should not exceed 20 queries. Usualy when you get problems with this, you could run hundreds.

Get TextBox Text value in a button

I'm trying to get the value of txt_MRP in the codebehind but it keeps giving me
The name "txt_MRP" doesn't exist in this current context
Why is this reference not available? How can I get it?
(The button that I am pressing is btn_add_to_cart_Click)
<div class="row">
<div class="col-lg-2"></div>
<div class="col-lg-4">
<asp:DataList ID="DataList3" runat="server" DataSourceID="SqlDataSource1">
<ItemTemplate>
<ul id="etalage">
<li>
<img id="Img1" class="etalage_thumb_image" runat="server" src='<%# Eval("Fotografia1") %>' />
<img id="Img2" class="etalage_source_image" runat="server" src='<%# Eval("Fotografia2") %>' />
</li>
</ul>
<br />
</ItemTemplate>
</asp:DataList>
</div>
<div class="col-lg-6">
<asp:DataList ID="DataList1" runat="server" DataKeyField="ID" DataSourceID="SqlDataSource1" >
<ItemTemplate>
<div id="product_name_width">
<asp:Label ID="Product_nameLabel" runat="server" CssClass="product_name" Text='<%# Eval("Nombre") %>' />
<br />
</div>
<span id="rs">₡</span><asp:Label ID="MRPLabel" CssClass="price" runat="server" Text='<%# Eval("Precio") %>' />
<br />
<br />
<span id="brand_name">Marca</span>
<asp:Label ID="BrandLabel" runat="server" CssClass="brand" Text='<%# Eval("Marca") %>' />
<br />
</div>
<div class="form-group">
<label> Cantidad </label>
<asp:TextBox CssClass="form-control" ID="txt_MRP" runat="server" ></asp:TextBox>
</div>
<div id="buy_now_css" runat="server">
<ul>
<li>
<asp:Button ID="btn_add_to_cart" CssClass="btn btn-primary" runat="server" Text="Añadir al Carrito" OnClick="btn_add_to_cart_Click" />
</li>
<li>
<asp:Button ID="btn_buy_now" CssClass="btn btn-success" runat="server" Text="Comprar" OnClick="btn_buy_now_Click" />
</li>
</ul>
</div>
</ItemTemplate>
</asp:DataList>
<asp:DataList ID="DataList2" runat="server" DataKeyField="ID" DataSourceID="SqlDataSource1">
<ItemTemplate>
<h2>Descripcion</h2>
<div id="Description_width">
<asp:Label ID="DetailLabel" CssClass="description" runat="server" Text='<%# Eval("Descripcion") %>' />
</div>
</ItemTemplate>
</asp:DataList>
</div>
</div>

txt_MRP does not exist because it is in a DataList Control. It is only available inside the scope of the Control.
If you want to get the value you have to use another method.
Change the button event from Onclick to OnCommand and add a CommandName and set the ItemIndex as CommandArgument.
<asp:Button ID="btn_add_to_cart" CommandName="addToCart" CommandArgument='<%# Container.ItemIndex %>' CssClass="btn btn-primary" runat="server" Text="Añadir al Carrito" OnCommand="btn_add_to_cart_Command" />
And in code behind
protected void btn_add_to_cart_Command(object sender, CommandEventArgs e)
{
//check the correct commandname
if (e.CommandName == "addToCart")
{
//get the row number from the commandargument
int itemIndex = Convert.ToInt32(e.CommandArgument);
//find the texbox in the correct row with findcontrol
TextBox textBox = DataList1.Items[itemIndex].FindControl("txt_MRP") as TextBox;
//do stuff with the value
Label1.Text = textBox.Text;
}
}

You have to assign the delegate or button. For instance:
var button = new Button();
button.Click += new EventHandler("btnAddToCart");
You also may need a CommandArgument, to be able to send a specific value back. But to actually register the click event would be like the above.

Response of link button inside update panel is too late in asp.net C#

When I click on Flag button all operation to be perform by button click are working very well but it take nearly 7 8 seconds to Show effects on screen..
My Asp.net code:
<asp:ScriptManager runat="server" EnablePartialRendering="true" ID="SC1"></asp:ScriptManager>
<!-- Get Mile-->
<div class="row">
<div class="col-md-2"></div>
<div class="col-md-7">
<%-- <asp:UpdatePanel runat="server" ID="UpdatePanel1">
<ContentTemplate>--%>
<ul class="timeline-list">
<asp:Repeater runat="server" ID="repeater_post" OnItemDataBound="repeater_post_ItemDataBound" OnItemCreated="repeater_post_ItemCreated">
<ItemTemplate>
<li class="media media-clearfix-xs">
<div class="media-body">
<div class="media-body-wrapper">
<div class="panel panel-default ">
<asp:Image runat="server" ID="img_PostPic" ImageUrl='<%# GetImagePath(Eval("ImagePath").ToString()) %>' CssClass="img-responsive" Style="height: 200px !important; width: 526px !important" />
<%--<asp:Image runat="server" ID="Image1" ImageUrl='<%# GetMood(Eval("Mood").ToString()) %>' class="pull-right" />--%>
<div class="view-all-comments">
<asp:UpdatePanel runat="server" ID="upd5" UpdateMode="Always">
<ContentTemplate>
<asp:LinkButton runat="server" CommandArgument='<%# Eval("PostID").ToString() %>' ID="lbtn_Flag" CssClass="btn btn-white" ToolTip='<%# GetAllFlagMember(Convert.ToString(Eval("PostID"))) %>' OnClick="lbtn_Flag_Click" Visible='<%# CheckFlag(Eval("PostID"))%>'>
<i class="fa fa-flag"></i>
</asp:LinkButton>
<asp:LinkButton runat="server" CommandArgument='<%# Eval("PostID") %>' ID="lbtn_Unflag" CssClass="btn btn-white" ToolTip='<%# GetAllFlagMember(Convert.ToString(Eval("PostID"))) %>' OnClick="lbtn_Unflag_Click" Visible='<%# CheckUnFlag(Eval("PostID"))%>'>
<i class="fa fa-flag"></i> Unflag
</asp:LinkButton>
<strong> <%# GetFlagCount(Eval("PostID").ToString())%> Flag</strong>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="lbtn_Flag" EventName="Click" />
<asp:AsyncPostBackTrigger ControlID="lbtn_Unflag" EventName="Click" />
</Triggers>
</asp:UpdatePanel>
<%--<asp:LinkButton runat="server" ID="lbtnflagmember" CommandArgument='<%# Eval("PostID")%>' Text='<%# GetFlagCount(Eval("PostID").ToString())%>'></asp:LinkButton>--%>
<!-- Go to www.addthis.com/dashboard to customize your tools -->
<div class="addthis_sharing_toolbox" style="float: right"></div>
<asp:LinkButton runat="server" CommandArgument='<%# Eval("Lat")+"$"+Eval("Long")+"$"+Eval("PostAutorID")+"$"+Eval("Destination") %>' ID="lbtn_MapCanvas" ToolTip="Map" OnClick="lbtn_MapCanvas_Click" CssClass="pull-right" CausesValidation="false"> <i class="fa fa-map-marker"></i> Navigate
</asp:LinkButton>
<asp:LinkButton runat="server" CommandArgument='<%# Eval("PostID")+"$"+Eval("Destination") %>' ID="lbtn_ReportAbuse" ToolTip="Report Abuse" OnClick="lbtn_ReportAbuse_Click" CssClass="pull-right"> <i class="fa fa-share-square-o "></i> Report Abuse
</asp:LinkButton>
</div>
</div>
</div>
</div>
</li>
</ItemTemplate>
</asp:Repeater>
</ul>
My C# Back end Code on link buttons is :
protected void lbtn_Flag_Click(object sender, EventArgs e)
{
//lbtn_Flag.Enabled = false;
//lbtn_Unflag.Enabled = true;
LinkButton btn = (LinkButton)sender;
int _PostId = Convert.ToInt32(btn.CommandArgument);
WStblFlag wsFlag = new WStblFlag();
string res = wsFlag.AddFlag(_PostId, Functions.ParseInteger(Convert.ToString(Session["ProfileID"])));
GetPost();
//UpdatePanel up = repeater_post.FindControl("upd5") as UpdatePanel;
//up.Update();
//UpdatePanel inner_rpt = (UpdatePanel)repeater_post.Items.FindControl("repeater_Comment");
}
/// <summary>
/// UnFlag the post
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void lbtn_Unflag_Click(object sender, EventArgs e)
{
//lbtn_Flag.Enabled = true;
//lbtn_Unflag.Enabled = false;
LinkButton btn = (LinkButton)sender;
int _PostId = Convert.ToInt32(btn.CommandArgument);
WStblFlag wsFlag = new WStblFlag();
string res = wsFlag.UnFlagPost(_PostId, Functions.ParseInteger(Convert.ToString(Session["ProfileID"])));
GetPost();
}
I already try many things to reduce response time but it wont succeed...
Ty..

Image display using datalist

Here is my code which I used image slider display image using datalist but I don't have any idea how can I display big image when image slide here is my code:
<div id="photos" class="galleryview">
<img src="images/home_gallery/banner1.jpg" />
<div style="margin: 30px 0px 0px 0px">
<asp:DataList RepeatDirection="Horizontal" ID="dl_Images" runat="server" OnItemDataBound="dl_Images_ItemDataBound"
OnItemCommand="dl_Images_ItemCommand">
<ItemTemplate>
<ul class="filmstrip">
<div class="panel">
<a href="" id="img_href" runat="server">
<div class="panel-overlay" align="left">
<li>
<asp:Image BorderColor="#ececec" BorderStyle="Solid" BorderWidth="1" runat="server"
ID="i_ProductImage" Width="104" Height="104" />
</li>
</a>
</div>
<div align="center" style="margin: 0px 0px 0px 0px">
<asp:LinkButton ToolTip='<%# Eval("ProductID") %>' CommandArgument='<%# Eval("ProductID") %>'
CommandName="lbclick" ID="lb_productID" runat="server" Text='<%# Eval("ProductID") %>'
CssClass="bule-link"></asp:LinkButton>
</div>
<%--<asp:Label ID="l_ProductId" runat="server" Text='<%#Eval("ProductId") %>'></asp:Label>--%>
</div>
</ul>
</ItemTemplate>
</asp:DataList>
</div>
</div>