CAML-WebService共享点

Question

Hello stackoverflow community

I got a load of help from this forum. Though this time i couldn't find.

I Made an ASP.NET application and I try to use a SharePoint WebService to get some Items of a List.

So far i succeed in getting the whole list using CAML request, but i have to select the items between 2 given dates

I found a lot of help around this and I'm using this method to format the ISO 8601 date string :

private string FormatDateForCAML(DateTime theDate)
{
    string result = theDate.ToString("yyyy-MM-ddTHH:mm:ssZ");
    return result;
}

And here is the CAML request building :

System.Xml.XmlElement query = xmlDoc.CreateElement("Query");
query.InnerXml = 
        "<Where>"+
            "<And>"+
              "<Geq>"+
                  "<FieldRef Name=\"startdate\" />"+
                  "<Value Type=\"DateTime\" IncludeTimeValue=\"True\">" + theStart + "</Value>" +
              "</Geq>"+
              "<Lt>" +
                  "<FieldRef Name=\"enddate\" />" +
                  "<Value Type=\"DateTime\" IncludeTimeValue=\"True\">" + theEnd+ "</Value>" +
              "</Lt>" +
            "</And>"+
        "</Where>";

I don't have any error return by this query :

System.Xml.XmlNode nodeListItems = listService.GetListItems(listName, viewName, query, viewFields, rowLimit, queryOptions, null);

But the list returned is null though it shoudn't

Thanks for any help.

EDIT : I finally succeed, problem came from a wrong request here is the proper version

System.Xml.XmlElement query = xmlDoc.CreateElement("Query");
query.InnerXml = 
        "<Where>"+
            "<And>"+
              "<Geq>"+
                  "<FieldRef Name=\"startdate\" />"+
                  "<Value Type=\"DateTime\" IncludeTimeValue=\"True\">" + theStart + "</Value>" +
              "</Geq>"+
              "<Lt>" +
                  "<FieldRef Name=\"startdate\" />" +
                  "<Value Type=\"DateTime\" IncludeTimeValue=\"True\">" + theEnd+ "</Value>" +
              "</Lt>" +
            "</And>"+
        "</Where>";

Thanks to Roqz I Used the CAML viewer,and I could get the problem : I had to compare the start date only !

Thank you both for help :)

Answer 1

In my CAML Builder Tool a Query similar to yours does return the result it should. Query looks like:

<Query>
    <Where>
        <And>
          <Geq>
            <FieldRef Name="Created" />
            <Value IncludeTimeValue="TRUE" Type="DateTime">2013-04-01T19:35:49Z</Value>                 
          </Geq>
          <Lt>
            <FieldRef Name="Modified" /><Value IncludeTimeValue="TRUE" Type="DateTime">2013-05-24T19:36:46Z</Value>
          </Lt>
        </And>
     </Where>
</Query>

But as I remember, if you want to use this query in code than you do not need the surrounding tags. Have you checked that your date format is correct? in your example I can't see the "Z" at the end.

Answer 2

Try to run your CAML query in a console application using full SharePoint object model with any clause you want like you want to filter on dates. If your CAML works in full SharePoint object model it should ideally work as well when you try to fetch data using SharePoint Native Web Services.

Answer 3

I wanted to add that this method :

private string FormatDateForCAML(DateTime theDate)
{
    string result = theDate.ToString("yyyy-MM-ddTHH:mm:ssZ");
    return result;
}

is equivalent to :

private string FormatDateForCAML(DateTime theDate)
{
    string result = theDate.ToString("s");
    return result;
}

date.ToString("s") return a ISO.8601 date format string.