What is <%# ? (resolved)

[mendhak]

An example I saw:

Customer: <%# custID %>

ASP 3.0 had <% = %> for response.write. I don't know what the # is though. Anyone?

[nemaroller]

Stop asking so many questions, you'll get us ALL in trouble....

Now, move along quickly...

[mendhak]

[plenderj]

Actually I was wondering again. I have adapted some code for my project:

			<asp:datalist id="DataList1" style="Z-INDEX: 101; LEFT: -1px; POSITION: absolute; TOP: 2px" runat="server" Height="20px" Width="100%">
				<HeaderTemplate>
					<TABLE id="table2" cellSpacing="3" cellPadding="1" width="100%" border="0">
						<TR>
							<TD align="left" width="52%"><FONT face="Verdana" size="2">Description<BR>
									Manufacturer</FONT></TD>
							<TD align="left" width="15%"><FONT face="Verdana" size="2">SAP #<BR>
									Manufacturer #</FONT></TD>
							<TD align="left" width="10%"><FONT face="Verdana" size="2">Details</FONT></TD>
							<TD align="left" width="10%"><FONT face="Verdana" size="2">Price</FONT></TD>
							<TD align="left" width="5%"><FONT face="Verdana" size="2">Stock</FONT></TD>
							<TD align="left" width="8%"><FONT face="Verdana" size="2">Buy</FONT></TD>
						</TR>
						<TR>
							<TD align="left" width="100%" colSpan="6">
								<HR noShade SIZE="1">
							</TD>
						</TR>
				</HeaderTemplate>
				<ItemTemplate>
					<TR>
						<INPUT id="txtStock<%# Container.DataItem(0) %>" type=hidden value="<%# Container.DataItem(6) %>" name="txtStock<%# Container.DataItem(0) %>" style="myTextBoxSmall">
						<TD bgcolor="#F0F0F0" valign="top"><FONT face="Verdana" size="1"><a href="ProductDetails.aspx?strSAPCode=<%# Container.DataItem(0) %>" target="" onMouseover="setStatusWindowText('View details of SAP Code : <%# Container.DataItem(0) %>');return true;" onMouseout="setStatusWindowText('');return true;"><%# Container.DataItem(2) %></a><BR>
								<%# Container.DataItem(8) %>
								-
								<%# Container.DataItem(9) %>
							</FONT>
						</TD>
						<TD bgcolor="#F0F0F0" valign="top"><FONT face="Verdana" size="1"><%# Container.DataItem(0) %><BR>
								<%# Container.DataItem(5) %>
							</FONT>
						</TD>
						<TD bgcolor="#F0F0F0" valign="top"><FONT face="Verdana" size="1"><a href="<%# Container.DataItem(3) %>" target=_new>details</a></FONT></TD>
						<TD bgcolor="#F0F0F0" valign="top"><FONT face="Verdana" size="1"><%# Container.DataItem(4) %></FONT></TD>
						<TD bgcolor="#F0F0F0" valign="top"><FONT face="Verdana" size="1"><%# Container.DataItem(6) %></FONT></TD>
						<TD bgcolor="#F0F0F0" valign="top"><FONT face="Verdana" size="1"> <INPUT class=myTextBoxSmall type=text size=5 name="txtAdd<%# Container.DataItem(0) %>" id="txtAdd<%# Container.DataItem(0) %>">&nbsp;
								<A onmouseover="setStatusWindowText('Add <%# Container.DataItem(0) %> to your shopping cart');return true;" onmouseout="setStatusWindowText('');return true;" href="javascript:addToCart('<%# Container.DataItem(0) %>', document.all.item('txtAdd<%# Container.DataItem(0) %>').value, document.all.item('txtStock<%# Container.DataItem(0) %>').value)">
									Buy</A></FONT></TD>
					</TR>
				</ItemTemplate>
				<AlternatingItemTemplate>
					<TR>
						<INPUT id="txtStock<%# Container.DataItem(0)%>" type=hidden value="<%# Container.DataItem(6) %>" name="txtStock<%# Container.DataItem(0) %>"><TD bgcolor="#E1E1E1" valign="top"><FONT face="Verdana" size="1"><a href="ProductDetails.aspx?strSAPCode=<%# Container.DataItem(0) %>" target="" onMouseover="setStatusWindowText('View details of SAP Code : <%# Container.DataItem(0) %>');return true;" onMouseout="setStatusWindowText('');return true;"><%# Container.DataItem(2) %></a><BR>
								<%# Container.DataItem(8) %>
								-
								<%# Container.DataItem(9) %>
							</FONT>
						</TD>
						<TD bgcolor="#E1E1E1" valign="top"><FONT face="Verdana" size="1"><%# Container.DataItem(0) %><BR>
								<%# Container.DataItem(5) %>
							</FONT>
						</TD>
						<TD bgcolor="#E1E1E1" valign="top"><FONT face="Verdana" size="1"><a href="<%# Container.DataItem(3) %>" target=_new>details</a></FONT></TD>
						<TD bgcolor="#E1E1E1" valign="top"><FONT face="Verdana" size="1"><%# Container.DataItem(4) %></FONT></TD>
						<TD bgcolor="#E1E1E1" valign="top"><FONT face="Verdana" size="1"><%# Container.DataItem(6) %></FONT></TD>
						<TD bgcolor="#E1E1E1" valign="top"><FONT face="Verdana" size="1"> <INPUT class=myTextBoxSmall type=text size=5 name="txtAdd<%# Container.DataItem(0) %>" id="txtAdd<%# Container.DataItem(0) %>">&nbsp;
								<A onmouseover="setStatusWindowText('Add <%# Container.DataItem(0) %> to your shopping cart');return true;" onmouseout="setStatusWindowText('');return true;" href="javascript:addToCart('<%# Container.DataItem(0) %>', document.all.item('txtAdd<%# Container.DataItem(0) %>').value, document.all.item('txtStock<%# Container.DataItem(0) %>').value)">
									Buy</A></FONT></TD>
					</TR>
				</AlternatingItemTemplate>
			</asp:datalist>

I know what it does, but I don't know why...

[Lethal]

This expression is termed a 'Data Binding Expression'. So, when you call the DataBind method on a control or the page itself, the asp.net page parser will traverse through the page parse the contents where it finds this expression.

[plenderj]

Good stuff. Now while you're at it go and answer our other .net questions

[mendhak]

Ah. Makes sense!

Jamie, won't you be a dear and add [Resolved] to this thread? (Because you can, and I'm asking you nicely)

[plenderj]

I was about to ask why... but I really couldn't be bothered.
Its easier for me to just do it