Develop Reference

Decimal point in "Convert.ToInt" statement causing Format Error?

I have been following this tutorial to help me create a basic shopping basket. When trying to run the code with the below method added which should calculate the TotalPrice & TotalProducts of the basket on the OrderForm, I get the following error:
'System.FormatException' occurred in mscorlib.dll but was not handled in user code. Additional information: Input string was not in a correct format.
pointing at the line
long ProductPrice =
Convert.ToInt64(PriceLabel.Text) *
Convert.ToInt64(ProductQuantity.Text);
In the database, an example of a ProductPrice is "199.99" where as the tutorial only used whole numbers e.g. "199". I am not sure if this is what is causing the issue? If this is the case, how should the code below be modified to include the decimal point too?
I am new to coding, so this is really stressing me out, I really would appreciated some guideance/suggested code changes to overcome this issue
Thanks as ever guys!
private void UpdateTotalBill()
{
long TotalPrice = 0;
long TotalProducts = 0;
foreach (DataListItem item in dlBasketItems.Items)
{
//Finds the price label on pnlMyBasket
Label PriceLabel = item.FindControl("lblPrice") as Label;
//Finds the quantity text box on pnlMyBasket
TextBox ProductQuantity = item.FindControl("txtProductQuantity") as TextBox;
long ProductPrice = Convert.ToInt32(PriceLabel.Text) * Convert.ToInt32(ProductQuantity.Text);
TotalPrice = TotalPrice + ProductPrice;
TotalProducts = TotalProducts + Convert.ToInt32(ProductQuantity.Text);
}
txtTotalPrice.Text = Convert.ToString(TotalPrice);
txtTotalProducts.Text = Convert.ToString(TotalProducts);
}
pnlMyBasket
<asp:Panel ID="pnlMyBasket" runat="server" ScrollBars="Auto" Height="500px" BorderColor="Black" BorderStyle="Inset" BorderWidth="1px" Visible="false">
<table align="center" cellspacing="1">
<tr>
<td align="center" class="auto-style4">
<asp:Label ID="lblAvailableStockAlert" runat="server" ForeColor="Red" Font-Bold="true"></asp:Label>
<asp:DataList ID="dlBasketItems" runat="server" RepeatColumns="3" Font-Bold="False"
Font-Italic="False" Font-Overline="False" Font-Strikeout="False" Font-Underline="False"
Width="551px">
<ItemTemplate>
<div align="left">
<table cellspacing="1" style="border: 1px ridge #9900FF; text-align: center; width: 172px;">
<tr>
<td style="border-bottom-style: ridge; border-width: 1px; border-color: #000000">
<asp:Label ID="lblProductName" runat="server" Text='<%# Eval("ProductName")%>' Style="font-weight: 700"></asp:Label>
</td>
</tr>
<tr>
<td>
<img alt="" src='<%# Eval("ProductImageUrl") %>' runat="server" id="imgProductPhoto" style="border: ridge 1px black;
width: 157px; height: 130px;" />
</td>
</tr>
<tr>
<td>AvailableStock: <asp:Label ID="lblAvailableStock" runat="server" Text='<%# Eval("ProductStock") %>'
ToolTip="Available Stock" ForeColor="Red" Font-Bold="true"></asp:Label>
<br />
Price:<asp:Label ID="lblPrice" runat="server" Text='<%# Eval ("ProductPrice") %>'></asp:Label>
<br /> Quantity Required x
<asp:TextBox ID="txtProductQuantity" runat="server" Width="20px" Height="10px" MaxLength="2" OnTextChanged="txtProductQuantity_TextChanged" AutoPostBack="true" ></asp:TextBox>
<asp:HiddenField ID="hfProductID" runat="server" Value='<%# Eval("ProductID") %>' />
</td>
</tr>
<tr>
<td>
<hr /> <asp:Button ID="btnRemoveFromBasket" runat="server" CommandArgument='<%# Eval("ProductID") %>'
Text="Remove From Basket" Width="100%" BorderColor="Black" BorderStyle="Inset" BorderWidth="1px"
OnClick="btnRemoveFromBasket_Click" CausesValidation="false" />
</td>
</tr>
</table>
</div>
</ItemTemplate>
<ItemStyle Width="33%" />
</asp:DataList>
</td>
</tr>
</table>
</asp:Panel>
pnlOrderForm
<asp:Panel ID="pnlOrderForm" runat="server" ScrollBars="Auto" Height="500px" BorderColor="Black"
BorderStyle="Inset" BorderWidth="1px" Visible="false">
<table style="width: 258px;">
<tr>
<td align="left">
Name:
</td>
</tr>
<tr>
<td>
<asp:TextBox ID="txtCustomerName" runat="server" Width="231px"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="txtCustomerName"
ErrorMessage="*" ForeColor="Red"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td align="left">
PhoneNo:
</td>
</tr
<tr>
<td>
<asp:TextBox ID="txtCustomerPhoneNo" runat="server" Width="231px" MaxLength="10"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="txtCustomerPhoneNo"
ErrorMessage="*" ForeColor="Red"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td align="left">
EmailID
</td>
</tr>
<tr>
<td>
<asp:TextBox ID="txtCustomerEmailID" runat="server" Width="231px"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" ControlToValidate="txtCustomerEmailID"
ErrorMessage="*" ForeColor="Red"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td align="left">
Address
</td>
</tr>
<tr>
<td align="left">
<asp:TextBox ID="txtCustomerAddress" runat="server" Width="227px" Height="81px"
TextMode="MultiLine"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server" ControlToValidate="txtCustomerAddress"
ErrorMessage="*" ForeColor="Red"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td align="left">
Total Products :
</td>
</tr>
<tr>
<td align="center">
<asp:TextBox ID="txtTotalProducts" runat="server" ReadOnly="True" Width="231px"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator5" runat="server" ControlToValidate="txtTotalProducts"
ErrorMessage="*" ForeColor="Red"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td align="left">
Total Price :
</td>
</tr>
<tr>
<td>
<asp:TextBox ID="txtTotalPrice" runat="server" ReadOnly="True" Width="231px"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator6" runat="server" ControlToValidate="txtTotalPrice"
ErrorMessage="*" ForeColor="Red"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td align="left">
Payment Mode:
</td>
</tr>
<tr>
<td align="left">
<asp:RadioButtonList ID="rblMethodOfPayment" runat="server">
<asp:ListItem Value="1" Selected="True">1. Collect & Pay In Store</asp:ListItem>
<asp:ListItem Value="2">2. Pay with card</asp:ListItem>
</asp:RadioButtonList>
</td>
</tr>
<tr>
<td>
<br />
</td>
</tr>
<tr>
<td>
<asp:Button ID="btnPlaceOrder" runat="server" OnClick="btnPlaceOrder_Click" Style="font-weight: 700"
Text="PlaceOrder" Width="90px" />
</td>
</tr>
<tr>
<td>
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="txtCustomerEmailID"
ErrorMessage="Please Enter Valid EmailId" ForeColor="Red" ValidationExpression="\w+([-+.']\w+)*#\w+([-.]\w+)*\.\w+([-.]\w+)*"></asp:RegularExpressionValidator>
</td>
</tr>
</table>
</asp:Panel>

I think you need to convert to decimal, then to long. Like this:
long ProductPrice;
try
{
// hey you never know, someone might just put in an int64 in that textbox!
ProductPrice = Convert.ToInt32(PriceLabel.Text) *
Convert.ToInt32(ProductQuantity.Text);
}
catch
{
decimal tempPrice = Convert.ToDecimal(PriceLabel.Text) *
Convert.ToDecimal(ProductQuantity.Text);
ProductPrice = Convert.ToInt64(tempPrice);
}

Most direct way to how you are currently doing:
var ProductPrice = Convert.ToDecimal(PriceLabel.Text) * Convert.ToDecimal(ProductQuantity.Text);
this will throw an exception if the value cannot be converted to a decimal. Decimal.TryParse() would be better.
https://msdn.microsoft.com/en-us/library/system.decimal.tryparse(v=vs.110).aspx

Calling user control within a user control

Hi I have two usercontrols.
The first user control has a button and the second user control has a popup control.
I registered the second user control in the first user control with id=ctlPopUp
Onclick event of button I have to display the popup control.
I tried with
protected void btnUser_Click(object sender, EventArgs e)
{
var userCtlPopup = ctlPopUp.FindControl("pcDownload");
userCtlPopup.Visible = true;
}
It doesn't work. Can you please suggest?
Hi here is the user control markups:
POpupUsercontrol:
<div id="divDownload" runat="server" visible="true">
<dx:aspxpopupcontrol id="pcDownload" runat="server" showpagescrollbarwhenmodal="true"
clientinstancename="pcDownload" enableclientsideapi="true" modal="True" popuphorizontalalign="WindowCenter"
popupverticalalign="WindowCenter" showheader="false" allowdragging="True" enableanimation="False"
enableviewstate="False" width="600px" autoupdateposition="true" closeaction="CloseButton">
<ContentCollection>
<dx:PopupControlContentControl ID="PopupControlContentControl4" runat="server"
Width="100%">
<dx:ASPxPanel ID="ASPxPanel3" runat="server">
<PanelCollection>
<dx:PanelContent ID="PanelContent4" runat="server">
<div>
<table class="cChildTable">
<tr>
<td>
<h3>Download</h3>
</td>
</tr>
<tr>
<td class="auto-style1">
<div class="hr">
</div>
<asp:Label ID="lblDownLoadMessages" runat="server" CssClass="cMessageArea"></asp:Label>
</td>
</tr>
</table>
<table class="cChildTable" border="0">
<tr><td style="font:bold" colspan="2"><asp:Label ID="Title" runat="server" Text="Content Link Title"></asp:Label></td></tr>
<tr>
<td style="vertical-align: top; width: 30px; padding: 2px" rowspan="8">
<asp:CheckBox ID="chkImg" runat="server" AutoPostBack="True" Checked="true" />
</td>
<td style="vertical-align: top" rowspan="3">
<asp:Image runat="server" ID="imgUpload" Width="100px" Height="100px" Style="top: 0px;" AlternateText="No Image" />
</td>
<td>
<asp:CheckBox ID="chkName" runat="server"
AutoPostBack="true" />
</td>
<td class="cLabel" style="width: 15%">
<asp:Label ID="lblName" runat="server" Text="Name:" Width="90px"></asp:Label>
</td>
<td>
<asp:TextBox ID="txtName" runat="server" CssClass="cText" Width="300px" MaxLength="75"></asp:TextBox>
</td>
</tr>
<tr>
<td>
<asp:CheckBox ID="chkCompany" runat="server"
AutoPostBack="true" />
</td>
<td class="cLabel" style="width: 15%">
<asp:Label ID="lblCompany" runat="server" Text="Company:" Width="90px"></asp:Label>
</td>
<td>
<asp:TextBox ID="txtCompany" runat="server" CssClass="cText" Width="300px" MaxLength="75"></asp:TextBox>
</td>
</tr>
<tr>
<td>
<asp:CheckBox ID="chkAddress" runat="server"
AutoPostBack="true" />
</td>
<td class="cLabel" style="width: 15%">
<asp:Label ID="lblAddress" runat="server" Text="Address:" Width="90px"></asp:Label>
</td>
<td>
<asp:TextBox ID="txtAddress" runat="server" CssClass="cText" Width="300px" MaxLength="75"></asp:TextBox>
</td>
</tr>
<tr>
<td rowspan="5" style="vertical-align:top"><asp:LinkButton ID="lnkAddImg" runat="server"> </asp:LinkButton></td>
<td>
<asp:CheckBox ID="chkCtyStateZip" runat="server"
AutoPostBack="true" />
</td>
<td class="cLabel" style="width: 15%">
<asp:Label ID="lblCtyStateZip" runat="server" Text="City, State Zip:" Width="90px"></asp:Label>
</td>
<td>
<asp:TextBox ID="txtCtyStateZip" runat="server" CssClass="cText" Width="300px" MaxLength="75"></asp:TextBox>
</td>
</tr>
<tr>
<td>
<asp:CheckBox ID="chkPhone" runat="server"
AutoPostBack="true" />
</td>
<td class="cLabel" style="width: 15%">
<asp:Label ID="lblPhone" runat="server" Text="Phone:" Width="90px"></asp:Label>
</td>
<td>
<asp:TextBox ID="txtPhone" runat="server" CssClass="cText" Width="150px" MaxLength="75"></asp:TextBox>
</td>
</tr>
<tr>
<td>
<asp:CheckBox ID="chkFax" runat="server"
AutoPostBack="true" />
</td>
<td class="cLabel" style="width: 15%">
<asp:Label ID="lblFax" runat="server" Text="Fax:" Width="90px"></asp:Label>
</td>
<td>
<asp:TextBox ID="txtFax" runat="server" CssClass="cText" Width="150px" MaxLength="75"></asp:TextBox>
</td>
</tr>
<tr>
<td>
<asp:CheckBox ID="chkEmail" runat="server"
AutoPostBack="true" />
</td>
<td class="cLabel" style="width: 15%">
<asp:Label ID="lblEmail" runat="server" Text="Email:" Width="90px"></asp:Label>
</td>
<td>
<asp:TextBox ID="txtEmail" runat="server" CssClass="cText" Width="150px" MaxLength="75"></asp:TextBox>
</td>
</tr>
<tr>
<td>
<asp:CheckBox ID="chkOther" runat="server"
AutoPostBack="true" />
</td>
<td class="cLabel" style="width: 15%">
<asp:Label ID="lblOther" runat="server" Text="Other:" Width="90px "></asp:Label>
</td>
<td>
<asp:TextBox ID="txtOther" runat="server" CssClass="cText" Width="150px" MaxLength="75"></asp:TextBox>
</td>
</tr>
<tr>
<td colspan="4">
<div class="buttons">
<span id="span2" class="cBtnLeft"><span class="cBtnMid"><span class="cBtnRight">
<asp:Button ID="btnDownLoad" runat="server" Width="65px" CssClass="cBtnRight" Text="Download"
OnClick="btnDownLoad_Click"/>
</span></span></span><span id="span1" class="cBtnLeft"><span class="cBtnMid"><span
class="cBtnRight">
<asp:Button ID="btnCancel" runat="server" Width="65px" CssClass="cBtnRight" Text="Cancel"
Visible="true" OnClick="btnCancel_Click" />
</span></span></span>
</div>
</td>
</tr>
</table>
</div>
</dx:PanelContent>
</PanelCollection>
</dx:ASPxPanel>
</dx:PopupControlContentControl>
</ContentCollection>
</dx:aspxpopupcontrol>
</div>
Usercontrol where the popup user control is called
<asp:Panel runat="server" ID="pnlCategoryDetail" Width="100%">
<dx:ASPxDataView ID="dvMARCCategoryDetail" runat="server" Width="100%"
ClientInstanceName="dvMARCCategoryDetail" style="clear: both" ColumnCount="2" RowsPerPage="2" OnPageIndexChanged="dvMARCCategoryDetail_PageIndexChanged">
<itemtemplate>
<table>
<tbody>
<tr>
<td>
<table>
<tr>
<td>
<asp:Image ID="ModelImage" runat="server" ImageUrl='<%#Eval("ImageUrl") %>'>
</asp:Image>
</td>
<td>
<div style="width: 5px" class="Spacer">
</div>
</td>
</tr>
</table>
</td>
<td>
<table>
<tr>
<td>
<asp:Label ID="ModelLabel" runat="server" Text='<%# Eval("DocumentName") %>' Font-Bold="True"
>
</asp:Label></td>
</tr>
<tr>
<td style="text-align:left;padding-bottom:1em;">
<asp:Label ID ="txtText1" runat="server" Text="The May edition of News Brief contains seven newsworthy articles"></asp:Label>
</td>
</tr>
<tr>
<td>
<asp:Label ID ="txtText2" runat="server" Text="Suggested Subject Line: The May 2014 News Brief has arrived!"></asp:Label>
</td>
</tr>
<tr>
<td style="white-space:nowrap;">
<a id="clink2" style="width:60px">Content Link 1</a>
<asp:ImageButton ID="ImageButton2" runat="server" OnClick="btnArrow_Click" ImageUrl="~/Images/DownloadArrow.png" ToolTip="Download Item" style="padding-top:8px"/>
<asp:ImageButton ID="ImageButton1" runat="server" OnClick="btnAdd_Click" ImageUrl="~/Images/Add.png" ToolTip="Add Item" style="padding-top:8px"/>
</td>
<td> </td></tr>
</table>
</td>
</tr>
</tbody>
</table>
</itemtemplate>
<paddings padding="0px" />
<itemstyle height="50px">
</itemstyle>
</dx:ASPxDataView>
</asp:Panel>
<div id="divCategoryPopup" runat="server">
<downloadPopUp:categoryPopup id="ctlPopUp" runat="server"></downloadPopUp:categoryPopup>
</div>
On click of btnArrow_Click the popup user control should be displayed

ASP.NET form validation triggered too soon

I have a two-step form that I set up with validation on the fields.
The validation for the first two fields (first name / last name) works as desired.
However the last two fields (user/password) get validated two soon.
I would like the user / password fields to get validate only on "submit button" click...
Here's a working example and my code.
www.smithy.somee.com
<script language="javascript" type="text/javascript">
$(document).ready(function () {
if (Page_ClientValidate("personalGroup")) {
$('#form-part-1').hide();
$('#form-part-2').fadeIn();
}
if (Page_ClientValidate("accountGroup")) {
$('#form-part-2').hide();
}
});
</script>
<form id="signup" runat="server">
<div>
<table id="validators">
<tr>
<td>
<asp:ValidationSummary ID="personalGroupSummary" runat="server" ValidationGroup="personalGroup" />
<asp:ValidationSummary ID="accountGroupSummary" runat="server" ValidationGroup="accountGroup" />
</td>
</tr>
</table>
<table id="form-part-1">
<tr>
<td>First Name:</td>
<td><asp:TextBox ID="txtFname" runat="server"></asp:TextBox></td>
</tr>
<tr>
<td>Last Name:</td>
<td><asp:TextBox ID="txtLname" runat="server"></asp:TextBox></td>
</tr>
<tr>
<td></td>
<td>
<asp:Button ID="continue" runat="server" causesvalidation="true" validationgroup="personalGroup" Text="Continue" />
</td>
</tr>
</table>
<table id="form-part-2">
<tr>
<td>Username:</td>
<td><asp:TextBox ID="txtUser" runat="server"></asp:TextBox></td>
</tr>
<tr>
<td>Password:</td>
<td><asp:TextBox ID="txtPass" runat="server"></asp:TextBox></td>
</tr>
<tr>
<td></td>
<td>
<asp:Button ID="btnSubmit" runat="server" validationgroup="accountGroup" Text="Submit" OnClick="btnSubmit_Click" />
</td>
</tr>
</table>
<!-- output -->
<table>
<tr>
<td>First: </td>
<td><asp:Label ID="lblFname" runat="server" Text=""></asp:Label></td>
</tr>
<tr>
<td>Last:</td>
<td><asp:Label ID="lblLname" runat="server" Text=""></asp:Label></td>
</tr>
<tr>
<td>User:</td>
<td><asp:Label ID="lblUser" runat="server" Text=""></asp:Label></td>
</tr>
<tr>
<td>Pass:</td>
<td><asp:Label ID="lblPass" runat="server" Text=""></asp:Label></td>
</tr>
</table>
</div>
<!-- validators -->
<asp:requiredfieldvalidator id="fvFname" runat="server" validationgroup="personalGroup" Display="None" ControlToValidate="txtFname" ErrorMessage='"First Name" is required'></asp:requiredfieldvalidator>
<asp:requiredfieldvalidator id="fvLname" runat="server" validationgroup="personalGroup" Display="None" ControlToValidate="txtLname" ErrorMessage='"Last Name" is required'></asp:requiredfieldvalidator>
<asp:requiredfieldvalidator id="fvUser" runat="server" validationgroup="accountGroup" Display="None" ControlToValidate="txtUser" ErrorMessage='"Username" is required'></asp:requiredfieldvalidator>
<asp:requiredfieldvalidator id="fvPass" runat="server" validationgroup="accountGroup" Display="None" ControlToValidate="txtPass" ErrorMessage='"Password" is required'></asp:requiredfieldvalidator>
<!-- validators -->
</form>

try adding EnableClientScript="False" to your validators
<asp:requiredfieldvalidator id="fvFname" runat="server"
EnableClientScript="False"
validationgroup="personalGroup" Display="None"
ControlToValidate="txtFname"
ErrorMessage='"First Name" is required'>
</asp:requiredfieldvalidator>

It turns out that Panel controls is the answer to my issue. I found a solution on this website. (compliments of Doug Seven). Built it and tested and works like a charm.
http://devproconnections.com/database-development/create-multistep-forms

Textfield clears after calendar control postback

I have 3 text fields on my page and one calendar control. After I fill in the 3 text boxes, then click a date on the calendar control, the bottom textfield clears out, losing its value. The other 2 text boxes have their values available and do not get cleared. The textboxes all have the same properties, but I can't figure out how to keep the value in the third textbox.
<table class="auto-style2" align="center">
<tr>
<td class="auto-style4" style="text-align: right">Project Name:</td>
<td style="text-align: left">
<asp:TextBox ID="TxtProjectName" runat="server" height="32px" width="211px" MaxLength="50" OnTextChanged="TxtProjectName_TextChanged" onKeyUp="Count(this,50)" onChange="Count(this,50)" TextMode="MultiLine"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="TxtProjectName" ErrorMessage="Field is required"></asp:RequiredFieldValidator>
</td>
</tr>
</table>
<table class="auto-style2" align="center">
<tr>
<td class="auto-style4" style="text-align: right">Project Description:</td>
<td style="text-align: left">
<asp:TextBox ID="TxtDescription" runat="server" height="45px" width="211px" TextMode="MultiLine" OnTextChanged="TxtDescription_TextChanged"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="TxtDescription" ErrorMessage="Field is required"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td class="auto-style4" style="text-align: right">Contact Name:</td>
<td style="text-align: left">
<asp:TextBox ID="TxtContactName" runat="server" Width="203px" OnTextChanged="TxtContactName_TextChanged" Height="16px"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" ControlToValidate="TxtContactName" ErrorMessage="Field is required"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td class="auto-style5">Business Area:</td>
<td class="auto-style3">
<asp:DropDownList ID="DDLBusinessArea" runat="server" style="text-align: left">
</asp:DropDownList>
</td>
</tr>
<tr>
<td class="auto-style4" style="text-align: right">Priority:</td>
<td style="text-align: left">
<asp:DropDownList ID="DDLPriority" runat="server">
</asp:DropDownList>
</td>
</tr>
<tr>
<td class="auto-style4" style="text-align: right">Desired Completion Date:</td>
<td style="text-align: left">
<asp:Calendar ID="Calendar1" runat="server">
<SelectedDayStyle Font-Bold="True" />
<TodayDayStyle ForeColor="#3333FF" />
</asp:Calendar>
</td>
</tr>
Its the TxtContactName that clears.

Remove spacing of label in specified design sample

I have following design:
Code for it:
<table width="70%" align="center" class ="TableBorder">
<tr>
<td colspan="2" class="Heading" align="center">
Add Client
</td>
</tr>
<tr>
<td class="NormalText" align="right">
Client Name:
</td>
<td align="left">
<asp:TextBox ID="txtClientName" runat="server" CssClass="ThinTextBox"></asp:TextBox>
<asp:Label ID="lblAgentName0" runat="server" ForeColor="#FF3300" Text="*"></asp:Label>
</td>
</tr>
<tr>
<td class="NormalText" width="40%" align="right">
Client Login Email ID:
</td>
<td align="left">
<asp:TextBox ID="txtClientID" runat="server" CssClass="ThinTextBox"></asp:TextBox>
<asp:Label ID="lblAgentName1" runat="server" ForeColor="#FF3300" Text="*"></asp:Label>
</td>
</tr>
<tr>
<td class="NormalText" align="right">
Client Password:
</td>
<td align="left">
<asp:TextBox ID="txtClientPwd" runat="server" CssClass="ThinTextBox"></asp:TextBox>
<asp:Label ID="lblAgentName2" runat="server" ForeColor="#FF3300" Text="*"></asp:Label>
</td>
</tr>
<tr>
<td align="right" class="NormalText">
Contact No.:</td>
<td align="left">
<asp:TextBox ID="txtContactNo" runat="server" CssClass="ThinTextBox"></asp:TextBox>
<asp:Label ID="lblAgentName3" runat="server" ForeColor="#FF3300" Text="*"></asp:Label>
</td>
</tr>
<tr>
<td align="right" class="NormalText" valign="top" >
Address:</td>
<td align="left">
<asp:TextBox ID="txtAddress" runat="server" CssClass="ThinTextBox"
Height="100px" TextMode="MultiLine" Width="200px"></asp:TextBox>
<asp:Label ID="lblAgentName4" runat="server" ForeColor="#FF3300" Text="*"></asp:Label>
</td>
</tr>
<tr>
<td align="right" class="NormalText" width="30%">
</td>
<td align="left">
<asp:Button ID="btnSave" runat="server" CssClass="ButtonColor" Text="Save" />
<asp:Button ID="btnCancel" runat="server" CssClass="ButtonColor"
Text="Cancel" />
</td>
</tr>
</table>
I just wanted to remove spacing between marked area of Address textbox and "*" label.
I tried to give property as valign="top" to label, but its not accepting it.
Please help me.

try this
add style="vertical-align:top;" to label
<asp:Label ID="lblAgentName4" runat="server" ForeColor="#FF3300" Text="*" style="vertical-align:top;"></asp:Label>

Try this one,
<table width="70%" align="center" class="TableBorder">
<tr>
<td colspan="3" class="Heading" align="center">
Add Client
</td>
</tr>
<tr>
<td class="NormalText" align="right">
Client Name:
</td>
<td align="left" colspan="2">
<asp:TextBox ID="txtClientName" runat="server" CssClass="ThinTextBox"></asp:TextBox>
<asp:Label ID="lblAgentName0" runat="server" ForeColor="#FF3300" Text="*"></asp:Label>
</td>
</tr>
<tr>
<td class="NormalText" width="40%" align="right">
Client Login Email ID:
</td>
<td align="left" colspan="2">
<asp:TextBox ID="txtClientID" runat="server" CssClass="ThinTextBox"></asp:TextBox>
<asp:Label ID="lblAgentName1" runat="server" ForeColor="#FF3300" Text="*"></asp:Label>
</td>
</tr>
<tr>
<td class="NormalText" align="right">
Client Password:
</td>
<td align="left" colspan="2">
<asp:TextBox ID="txtClientPwd" runat="server" CssClass="ThinTextBox"></asp:TextBox>
<asp:Label ID="lblAgentName2" runat="server" ForeColor="#FF3300" Text="*"></asp:Label>
</td>
</tr>
<tr>
<td align="right" class="NormalText">
Contact No.:
</td>
<td align="left" colspan="2">
<asp:TextBox ID="txtContactNo" runat="server" CssClass="ThinTextBox"></asp:TextBox>
<asp:Label ID="lblAgentName3" runat="server" ForeColor="#FF3300" Text="*"></asp:Label>
</td>
</tr>
<tr>
<td align="right" class="NormalText" valign="top">
Address:
</td>
<td align="left" class="style1" valign="top">
<asp:TextBox ID="txtAddress" runat="server" CssClass="ThinTextBox" Height="100px"
TextMode="MultiLine" Width="200px"></asp:TextBox>
</td>
<td align="left" valign="top">
<asp:Label ID="lblAgentName4" runat="server" ForeColor="#FF3300" Text="*"></asp:Label>
</td>
</tr>
<tr>
<td align="right" class="NormalText" width="30%">
</td>
<td align="left" colspan="2">
<asp:Button ID="btnSave" runat="server" CssClass="ButtonColor" Text="Save" />
<asp:Button ID="btnCancel" runat="server" CssClass="ButtonColor" Text="Cancel" />
</td>
</tr>
</table>

you must use text vertical-align: text-top; in your css for td like this:
<td align="left" style="vertical-align: text-top;">
<asp:TextBox ID="txtAddress" runat="server" CssClass="ThinTextBox"
Height="100px" TextMode="MultiLine" Width="200px"></asp:TextBox>
<asp:Label ID="lblAgentName4" runat="server" ForeColor="#FF3300" Text="*"></asp:Label>
</td>
Because your asp renders your Label control to html span element, and for spans need text-top style/