using where to find children with a certain datepicker value - Razor

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Giles Dermody 14 posts 35 karma points

Aug 05, 2011 @ 11:52
0

Using .Where() to find children with a certain datepicker value
I'm currently rewriting an XSLT macro to display child nodes of the current page, depending on what querystring variables are set for 'month' and 'year'. This is used for a news listings page which displays articles for a certain period.

In the old macro, I am looping through and selecting nodes where the month part of the "newsDate" property (which is a datepicker field) and assigning them to the nodelist variable. $Displaymonth is gathered from querystring.
```
<xsl:for-each select="$currentPage/*[@isDoc]">
          <xsl:sort order="descending" select="newsDate" data-type="text"/>
          <xsl:if test="umbraco.library:FormatDateTime(newsDate, '%M') = $displayMonth">
            <xsl:copy-of select="." />
          </xsl:if>
</xsl:for-each>
```
I am having trouble creating a similar list of nodes using razor syntax. Assuming the querystring month is August, I have tried things like
```
Model.Children.Where(umbraco.library.FormatDateTime(newsDate,'M') + " == 8");
Model.Children.Where("Convert.ToDateTime(newsDate).Month == \"8\"");
Model.Children.Where("newsDate.Month == \"8\"");
Model.Children.Where("newsDate.Value.Month == \"8\"");
```
The debug errors mostly complain that there is no property "month" inside my newsDate variable. Either that or "No property or field date exists in type 'Func`2'". It seems to be treating my Datepicker property as a string whatever I do, as described here but I am using the latest version of umbraco.

How can I find children by converting the month/year of a datepicker property and comparing that to a variable? How can I even get this date property and extract the month/year, while inside a .Where statement?
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Rajeev 126 posts 154 karma points

Aug 05, 2011 @ 12:16

0

Could you try this?

Model.Children.Where(i=>Convert.ToDateTime(i.GetProperty("newsDate").Value).Month==8))

-Rajeev

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Giles Dermody 14 posts 35 karma points

Aug 05, 2011 @ 12:20

0

CS1977: Cannot use a lambda expression as an argument to a dynamically dispatched operation without first casting it to a delegate or expression tree type

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Rajeev 126 posts 154 karma points

Aug 05, 2011 @ 13:45

0

Sorry, I just haven't tried that. That won't work. :(.

You can try using if condition like you are doing in XSLT. There may be better ways for doing this. I couldn't ge this work with Where. :(

   var [email protected];
    foreach(var item in list)
    {
         if(Convert.ToDateTime(item.GetProperty("newsDate").Value).Month.ToString()=="8")
         {
             @item.Name

         }
   }

you may get better answers from experts here.

-Rajeev

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Using .Where() to find children with a certain datepicker value