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how to add a separator in between datalist in asp.net?

I'm using one datalist - "datalist2" in that I have "RepeatColumns="5". I need a separator template or line after a one line which contains 5 items. I need a separator after 5 items.
<asp:DataList ID="DataList2" runat="server" RepeatColumns="5" GridLines="None" CellSpacing="5" CellPadding="10">
<ItemStyle HorizontalAlign="Center" />
<ItemTemplate>
<asp:ImageButton ID="ImageButton1" runat="server" ImageUrl='<%#"~/images//"+ Eval("image") %>' PostBackUrl='<%# Eval("p_id", "p_Details.aspx?ProductID={0}") %>' Height="240px" Width="180px" /><br /><br />
<asp:Label ID="NameLabel" runat="server" Text='<%# Eval("p_name") %>' style="font-family:Arial;font-size:12px;"></asp:Label><br /><br />
<asp:Label ID="PriceLabel" runat="server" Text='<%# "Rs."+ Eval("unit_price") %>' ForeColor="Red" style="font-family:Arial;font-size:12px;"></asp:Label>
<asp:Label ID="Discount" runat="server" Text='<%#"Rs." + "( " + Eval("discount") + "% " + " )" %>' ForeColor="Red" style="font-family:Arial;font-size:12px;" ></asp:Label><br />
<asp:Button CssClass="orange-btn" ID="LBCart" runat="server" Text="View" onclick="LBCart_Click" />
<asp:Button CssClass="orange-btn" ID="Button1" runat="server" Text="Add to Cart" OnClick="Button1_Click" /><br />
<br />
</ItemTemplate>
<SeparatorTemplate>
<hr />
</SeparatorTemplate>
</asp:DataList>

<asp:DataList>
<SeparatorTemplate>
<hr />
</SeparatorTemplate>
</asp:DataList>

Use the <hr> tag at the end of your item template in the DataList. That will display a line as a separator. You can then style it as per your requirement.
It displays like this :

There is a similar question in the SO website - Row separator in datalist.
The answer which apparently worked had worked with CSS border applied to row in the ItemTemplate i.e the <td/> element.
In line with the discussion in that thread, SeperatorTemplate of DataList is to seperate items not the rows. MSDN document - https://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.datalist.separatortemplate%28v=vs.110%29.aspx also talks in that line.

Failing to update my Grid using template field

I use EntityDataSource.
When I want to insert into the "ShiftDetails" table with the following data: (3,1,04:00:00)
It is inserted fine if I use:
<telerik:GridBoundColumn DataField="startTime" HeaderText="startTime" SortExpression="startTime"
UniqueName="startTime" DataType="System.TimeSpan" EmptyDataText="00:00:00" >
When I try this with templatefield, the startTime is 00:00:00 instead of 04:00:00
<telerik:GridTemplateColumn HeaderText="startTime" >
<ItemTemplate>
<asp:Label runat="server" ID="lblstartTime" Text='<%# Eval("startTime")%>'></asp:Label>
</ItemTemplate>
<InsertItemTemplate>
<telerik:RadDateInput ID="txt_startTime" runat="server" DbSelectedDate='<%# Eval("startTime","{0:hh\\:mm\\:ss}") %>' DateFormat="HH:mm:ss" DisplayDateFormat="HH:mm:ss"
Culture="English (United States)" LabelWidth="64px"
Width="160px" Height="20px" EmptyMessage="!">
<EmptyMessageStyle ForeColor="Red" />
</telerik:RadDateInput>
</InsertItemTemplate>
<EditItemTemplate>
<telerik:RadDateInput ID="txt_startTime" runat="server" DateFormat="HH:mm:ss" DisplayDateFormat="HH:mm:ss"
Culture="English (United States)" LabelWidth="64px"
Width="160px" Height="20px" EmptyMessage="!">
<EmptyMessageStyle ForeColor="Red" />
</telerik:RadDateInput>
</EditItemTemplate>
</telerik:GridTemplateColumn>
My rad grid is master-details
the source of the details :
<ef:EntityDataSource ID="GetSourceDetail" runat="server" ContextTypeName="ResidenceShift.RShiftEntities" EntitySetName="ShiftDetails" EnableDelete="True" EnableFlattening="False" EnableInsert="True" EnableUpdate="True" ConnectionString="name=RShiftEntities" DefaultContainerName="RShiftEntities" AutoGenerateWhereClause="True" Include="ResidenceShift,ShiftType" AutoPage="False" AutoSort="False" EntityTypeFilter="" Select="" Where="" >
<WhereParameters>
<asp:SessionParameter DefaultValue="0" Name="shiftId" SessionField="shiftId" DbType="Int32" />
</WhereParameters>
</ef:EntityDataSource>
Why does it work fine with the bound field and then fails with the template field?!

Try using RadDateTimePicker instead, as it should also submit the time.

Easy user interface change depending on selection

So I have a dropdownlist with 2 items : Path and Queue
If the item selected is a Path, then the next thing displayed in the next div is a textBox (txtLocation), and if it is a Queue, then I have to show a DropDownList(cmbLocation) which items are part of a xml file.
Type:
<dx:ASPxComboBox ID="cmbPathType" runat="server" Width="150px" TextField="TypeName"
ValueField="QueueMonitorConfigTypesID">
<DisabledStyle BackColor="LightGray" ForeColor="Black" />
<Items>
<dx:ListEditItem Text="Path" Value="Path" />
<dx:ListEditItem Text="Queue" Value="Queue" />
</Items>
<ValidationSettings ValidateOnLeave="false" RequiredField-IsRequired="true">
<RequiredField IsRequired="True" />
</ValidationSettings>
</dx:ASPxComboBox>
Location:
<dx:ASPxTextBox ID="txtLocation" runat="server" Width="150px">
<DisabledStyle BackColor="LightGray" ForeColor="Black" />
<ValidationSettings ValidateOnLeave="false" RequiredField-IsRequired="true">
<RequiredField IsRequired="True"></RequiredField>
</ValidationSettings>
</dx:ASPxTextBox>
<dx:ASPxComboBox ID="cmbLocation" runat="server" Width="150px" DataSourceID="queuesXML">
</dx:ASPxComboBox>
<asp:XmlDataSource ID="queuesXML" runat="server" DataFile="~/Config/Config.xml" XPath="queue/name" ></asp:XmlDataSource>
I know I'm using dev express, but that should not matter for this

you need to work on change event of combobox. And Use the selection values as condition.

Single RadioButton Select in GridView

In a gridview how can I do single radiobutton select without using JavaScript
<asp:TemplateField ShowHeader="False">
<ItemTemplate>
<asp:RadioButton ID="RadioButton1" runat="server" GroupName="GroupName" />
</ItemTemplate>
</asp:TemplateField

Give Different name to each radio button control and remove groupname attribute
e.g.
<asp:RadioButton ID="RadioButton2" runat="server" />

Gridview: Bind values from datatable to a column where control is dropdownlist but don't add them to dropdownlist

I have a simple dropdownlist.
-I have some columns.
-A column called Choose:
-The control of the column is a dropdownlist with 2 fixed items : Yes and No.
-In the dataTable the column "Choose" the cell has the text "nope";
If debug my webpage , in the gridview,the column that's containing
the dropdownlist is not showing the values from the dataTable . I want the gridview to show them .
So , I want to show the values from the column not from the
dropdownlist

The question is a bit confusing, but it sounds like you want to select the answer from the list. If so, something like this should work:
<ItemTemplate>
<asp:DropDownList ID="DropDownList1" runat="server" SelectedValue='<%# Eval("Answer") %>'>
<asp:ListItem Text="Yes" Value="1" />
<asp:ListItem Text="No" Value="0" />
</asp:DropDownList>
</ItemTemplate>
EDIT: Based on your last comment, it sounds like this is what you need:
<asp:TemplateField>
<ItemTemplate>
<%# Eval("SomeUnrelatedValue") %>
</ItemTemplate>
<EditItemTemplate>
<asp:DropDownList ID="DropDownList1" runat="server">
<asp:ListItem Text="Yes" Value="1" />
<asp:ListItem Text="No" Value="0" />
</asp:DropDownList>
</EditItemTemplate>
</asp:TemplateField>