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DataBinding Expressions with conditions...

Posted on 2009-07-02
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Last Modified: 2012-05-07
Hi,

I have the following DataBinding Expressions:  "<%#Eval("LocationCity")%>", "<%#Eval("LocationState")%>" & "<%#Eval("LocationZip")%>".  How can I check if <%#Eval("LocationCity")%> is empty or blank?  In other words, I don' t want to show the comma (,) when <%#Eval("LocationCity")%> is empty.  I tried "<%#if(Eval("LocationCity") != null)%>", it didn't work.

Please help. Thanks.


<asp:DataList 
            ID="dlLocations" 
            CssClass="dataView" 
            AlternatingItemStyle-BackColor="#F2F9FF" 
            BorderStyle="Solid" 
            BorderWidth="1px" 
            GridLines="Horizontal" 
            HorizontalAlign="Left" 
            Runat="server">
            <ItemTemplate>
             <%#Eval("LocationName")%><br />
              <%#Eval("LocationCity")%>,  <%#Eval("LocationState")%> <%#Eval("LocationZip")%>
            </ItemTemplate>
        </asp:DataList>

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Question by:WebAppDeveloper
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1 Comment
 
LVL 9

Accepted Solution

by:
Rahul Goel ITIL earned 500 total points
ID: 24769577
<asp:DataList
            ID="dlLocations"
            CssClass="dataView"
            AlternatingItemStyle-BackColor="#F2F9FF"
            BorderStyle="Solid"
            BorderWidth="1px"
            GridLines="Horizontal"
            HorizontalAlign="Left"
            Runat="server">
            <ItemTemplate>
             <%#Eval("LocationName")%><br />
              <asp:Label ID="locationCity" runat="server" Text="<%#Eval("LocationCity")%>, " /> <%#Eval("LocationState")%> <%#Eval("LocationZip")%>
            </ItemTemplate>
        </asp:DataList>

protected void DataList1_ItemDataBound(object sender, DataListItemEventArgs e)
    {
        if (e.Item.ItemType == ListItemType.Item ||
          e.Item.ItemType == ListItemType.AlternatingItem)
        {
            System.Data.DataRowView drv =
                (System.Data.DataRowView)(e.Item.DataItem);
            if (drv.Row["LocationCity"].ToString() == string.Empty)
                e.Item.FindControl("urcontrol").Visible = false;
        }
    }

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