Develop Reference

Asp.net Converting into "MMM/yyyy" issue

Converting the template field value.
The default is shown like 01-03-2015 00:00:00
I need in MMM/yyyy format
<asp:TemplateField HeaderText="MonthYear" SortExpression="MonthYear">
<ItemTemplate>
<asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("MonthYear")%>'></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>

Go with this:
<asp:TextBox ID="TextBox2" runat="server" Text='<%# Convert.ToDateTime(Eval("MonthYear")).ToString("MMM yyyy")%>'></asp:TextBox>

ASP.NET C# BoundField format (Remove leading zeros)

How should DataFormatString of BoundField in Gridview look like that values won't have leading zeros?
So far I got this:
<asp:BoundField DataField="NUMBER" HeaderText="Id. number" DataFormatString="{0:d}">
Expected result:
000001 -> 1
002101 ->2101
I tried to figure that problem out with official documentation and this page. So far unsuccessful.

When you want to format something properly in a boundfield, I always suggest converting it to a templatefield. It's much easier to work with than boundfields. Here is an example of how the templatefield will look like once it's converted.
<asp:TemplateField ShowHeader="False" Visible="False">
<EditItemTemplate>
<asp:TextBox ID="tbEditNumber" runat="server" Text='<%# Bind("Number","{0:n}") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:TextBox ID="tbNumber" runat="server" Text='<%# Bind("Number","{0:n}") %>'></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
within that template field I placed..
Text='<%# Bind("yourfield","{0:n}") %>'
This should format it into a number and should drop the leading zeros.
EDIT: You might be able to try
Text='<%# String.Format("{0:n}", Eval("Number") ) %>'

Another approach is to use String.Trim function. The following code is how I accomplished what you are trying to do:
<asp:TemplateField>
<ItemTemplate>
<asp:Label runat="server" Text="<%#Eval("NUMBER").ToString().TrimStart('0')%>" ></asp:Label>
</ItemTemplate>
</asp:TemplateField>
The tricky part was using the correct combination of quotes and single quotes. You can use
"
in place of the quote character around your datafield column that you are displaying.

Simplifiying A Kimmels answer, no need to place in a server label, no concern of single or double quotes, no concern of underlying datatype, as it casts the object to string, then performs a string.TrimStart, no need for codebehind
<asp:TemplateField HeaderText="Work Order">
<ItemTemplate>
<%# Eval("WorkOrder").ToString().TrimStart("0".ToCharArray()) %>
</ItemTemplate>
</asp:TemplateField>
0123456 = 123456
0012345 = 12345
if a server label is required, just start and end the text tag with single quotes
<asp:Label ID="lblWorkOrder" runat="server" Text='<%# Eval("WorkOrder").ToString().TrimStart("0".ToCharArray()) %>' />

Try this. Much cleaner this way.
Markup
<asp:TemplateField HeaderText="Id. number">
<EditItemTemplate>
<asp:TextBox ID="tbEditNumber" runat="server" Text='<%# ConvertToDigit(Eval("Number")) %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:TextBox ID="tbNumber" runat="server" Text='<%# ConvertToDigit(Eval("Number")) %>'></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
Code-behind
protected int ConvertToDigit(object oNum)
{
var i = 0;
if (oNum != null) int.TryParse(oNum.ToString(), out i);
return i;
}

How to Use Color Saved inside Database to be the background color of the label?

I'm using a label inside a gridview template field i want to set the background color of the label to the one i am geeting from the database which i saved using a colorpicker...is it possible if yes then how...here`s my label control
<asp:TemplateField>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<% # Bind("doctorname") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
I tried this but it didnt work....
<asp:Label ID="Label1" runat="server" BackColor='<% # Bind("color") %>' Text='<% # Bind("doctorname") %>'></asp:Label>

BackColor is a control property, not text. You could create a css class on the page, like:
.custom-color
{
background-color: '<% # Bind("color") %>'
}
And then you can specify the css class on the control:
<asp:Label ID="Label1" runat="server" CssClass="custom-color" Text='<% # Bind("doctorname") %>'></asp:Label>

#Eval Short Date

I am trying to add date From and date To to my products these values are store in my database as date. These are stored in this format 2013-01-15. The format is not a problem but when I display them on my application the time appears (1/15/2013 12:00:00 AM) how can I remove the time please. Below you can find the method Im databound the data.
<asp:Label ID="Label4" runat="server" Text='<% # Eval("soDateTo") %>' Font-Bold="False" Font-Size="Small"></asp:Label>

Try String Formatting within the Eval statement:
See ASP Forums
There are several ways to format the date.
<asp:label id="DateAddedLabel" runat="server" text='<%#
Eval("DateAdded", "{0:d}") %>'></asp:label>

Try this;
<asp:Label ID="Label4" runat="server" Text='<% # Eval("soDateTo", "{0:dd/MM/yyyy}") %>' Font-Bold="False" Font-Size="Small"></asp:Label>

Very similar to Daniel's solution, but it handles null:
<asp:label id="DateAddedLabel" runat="server" text=
'<%# (String.IsNullOrEmpty(Eval("DateAdded").ToString()))
? "No Date Available" : Eval("DateAdded", "{0:d}") %>'>
</asp:label>

This has been answered just fine, but I used to use a lot more Labels than were necessary and thought I'd offer a way without.
You can ignore the Label all together and put the Eval(...) method by itself.
For example if you are using this inside of a TemplateField
<asp:TemplateField HeaderText="Date To">
<ItemTemplate>
<%# Eval("soDateTo", "{0:MM/dd/yyyy}") %>
</ItemTemplate>
</asp:TemplateField>
You can use this to improve your CSS control a tad, such as
<div id="client_since">
<%# Eval("soDateTo", "{0:MM/dd/yyyy}") %>
</div>

Use DateTime.ToShortDateString Method to get rid of the time part of the date:
http://msdn.microsoft.com/en-us/library/system.datetime.toshortdatestring.aspx

Try this:
> <asp:Label ID="Label4" runat="server" Text='<% # Eval("soDateTo", "{0:d}") %>'
> Font-Bold="False" Font-Size="Small"></asp:Label>

Try this;
<asp:Label ID="lbldate" runat="server" Text='<%# (Convert.ToDateTime(Eval("soDateTo"))).ToShortDateString() %>'></asp:Label>

Javascript Breaking on < & > in a GridView edit box

I've got an Asp.Net GridView inside an UpdatePanel. It all works fine, except when one of the columns includes HTML special characters like < and >. The GridView is bound to a List<Entity> and the Entity class has a property Regex which is a System.Text.RegularExpressions.Regex.
At first I had this:
<asp:TemplateField HeaderText="RegEx">
<ItemTemplate>
<asp:Label ID="RegExLabel" runat="server" Text='<%#Eval("Regex") %>'
ToolTip='<%#Eval("Regex") %>' Width="102px" CssClass="Wrap" />
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="RegExTextBox" runat="server" Text='<%#Eval("Regex") %>'
Width="98px" />
</EditItemTemplate>
</asp:TemplateField>
With a value of (?<capture>\d+) this displayed ?\d+ when not editing, and when editing this row I got a script error and the edit, update and cancel buttons no longer work.
Then I tried the answer in this question and had this:
<asp:TemplateField HeaderText="RegEx">
<ItemTemplate>
<asp:Label ID="RegExLabel" runat="server"
Text='<%#System.Web.HttpUtility.HtmlEncode(Eval("Regex").ToString()) %>'
ToolTip='<%#System.Web.HttpUtility.HtmlEncode(Eval("Regex").ToString()) %>'
Width="102px" CssClass="Wrap" />
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="RegExTextBox" runat="server"
Text='<%#System.Web.HttpUtility.HtmlEncode(Eval("Regex").ToString()) %>'
Width="98px" />
</EditItemTemplate>
</asp:TemplateField>
This is slightly better, in that the tooltip and the non-editing version display correctly, but when I start editing I see: (?<capture>\d+) with the HTML Entities displayed raw. Does anyone know a way to encode the values (to stop the script error) while still displaying them correctly without the HTML entities in their raw state when editing?

<asp:TemplateField HeaderText="RegEx">
<ItemTemplate>
<asp:Literal Mode="Encode" ID="RegExLabel" runat="server" Text='<%#Eval("Regex") %>'
ToolTip='<%#Eval("Regex") %>' Width="102px" CssClass="Wrap" />
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="RegExTextBox" runat="server" Text='<%#Eval("Regex") %>'
Width="98px" />
</EditItemTemplate>
</asp:TemplateField>
and in the page directive add this ValidateRequest="false"