I want to build dynamic search query with subsonic 3.0.
who can help me?
Any sample Please.
Basically all you need to do is add conditions to an IQueryable based on your dynamic parameters. For example:
string productName = Request.Querystring[ProductName];
IQueryable<Product> productQuery = Product.All();
if(productName != null)
{
productQuery = productQuery.Where(product => product.Name == productName);
}
IList<Product> filteredList = productQuery.ToList();
Related
Creating a WCF in VisualStudio 2017, I need to create a WebMethod that will return multiple rows from a SQL query. Here is the code that is not working...
code
[WebMethod]
public List<TABLE_NAME> GetAllLineInfoDetailes(string OrderNumberSM)
{
string #OrdNumLG = OrderNumberSM;
List<TABLE_NAME> OrdNo = new List<TABLE_NAME>();
using (CONNECTION_NAME pubs = new CONNECTION_NAME())
{
var OrdNo_LINES = (from p in pubs.TABLE_NAME select p.OrderNumber == #OrdNumLG);
foreach (TABLE_NAME OrderLine in OrdNo_LINES)
{
TABLE_NAME a = new TABLE_NAME();
a.ItemNumber = OrderLine.ItemNumber;
a.LineNumber = OrderLine.LineNumber;
a.OrderNumber = OrderLine.OrderNumber;
OrdNo.Add(a);
}
}
return OrdNo;
}
code
The foreach is giving error "Cannot convert type 'bool' to 'CONNECTION_NAME.TABLE_NAME'"
Any help with this, or a better way to return the full result set, would be appreciated.
As the error says, it's a type conversion problem.
You need to
var OrdNo_LINES = (from p in pubs.TABLE_NAME select p.OrderNumber = #OrdNumLG);
replace
var OrdNo_LINES = (from p in pubs.TABLE_NAME select p.OrderNumber == #OrdNumLG);
Found what will work...
[WebMethod]
public List<TABLE_NAME> GetAllLineInfoDetailes(string OrderNumberSM)
{
string #OrdNumSM = OrderNumberSM;
using (CONNECTION_NAME pubs = new CONNECTION_NAME())
{
var query = (from c in pubs.TABLE_NAME
where c.OrderNumber == #OrdNumSM
orderby c.LineNumber ascending
select c).ToList();
return query;
}
}
When I have an array of Sitecore IDs, for example TargetIDs from a MultilistField, how can I query the ContentSearchManager to return all the SearchResultItem objects?
I have tried the following which gives an "Only constant arguments is supported." error.
using (var s = Sitecore.ContentSearch.ContentSearchManager.GetIndex("sitecore_master_index").CreateSearchContext())
{
rpt.DataSource = s.GetQueryable<SearchResultItem>().Where(x => f.TargetIDs.Contains(x.ItemId));
rpt.DataBind();
}
I suppose I could build up the Linq query manually with multiple OR queries. Is there a way I can use Sitecore.ContentSearch.Utilities.LinqHelper to build the query for me?
Assuming I got this technique to work, is it worth using it for only, say, 10 items? I'm just starting my first Sitecore 7 project and I have it in mind that I want to use the index as much as possible.
Finally, does the Page Editor support editing fields somehow with a SearchResultItem as the source?
Update 1
I wrote this function which utilises the predicate builder as dunston suggests. I don't know yet if this is actually worth using (instead of Items).
public static List<T> GetSearchResultItemsByIDs<T>(ID[] ids, bool mustHaveUrl = true)
where T : Sitecore.ContentSearch.SearchTypes.SearchResultItem, new()
{
Assert.IsNotNull(ids, "ids");
if (!ids.Any())
{
return new List<T>();
}
using (var s = Sitecore.ContentSearch.ContentSearchManager.GetIndex("sitecore_master_index").CreateSearchContext())
{
var predicate = PredicateBuilder.True<T>();
predicate = ids.Aggregate(predicate, (current, id) => current.Or(p => p.ItemId == id));
var results = s.GetQueryable<T>().Where(predicate).ToDictionary(x => x.ItemId);
var query = from id in ids
let item = results.ContainsKey(id) ? results[id] : null
where item != null && (!mustHaveUrl || item.Url != null)
select item;
return query.ToList();
}
}
It forces the results to be in the same order as supplied in the IDs array, which in my case is important. (If anybody knows a better way of doing this, would love to know).
It also, by default, ensures that the Item has a URL.
My main code then becomes:
var f = (Sitecore.Data.Fields.MultilistField) rootItem.Fields["Main navigation links"];
rpt.DataSource = ContentSearchHelper.GetSearchResultItemsByIDs<SearchResultItem>(f.TargetIDs);
rpt.DataBind();
I'm still curious how the Page Editor copes with SearchResultItem or POCOs in general (my second question), am going to continue researching that now.
Thanks for reading,
Steve
You need to use the predicate builder to create multiple OR queries, or AND queries.
The code below should work.
using (var s = Sitecore.ContentSearch.ContentSearchManager.GetIndex("sitecore_master_index").CreateSearchContext())
{
var predicate = PredicateBuilder.True<SearchResultItem>();
foreach (var targetId in f.Targetids)
{
var tempTargetId = targetId;
predicate = predicate.Or(x => x.ItemId == tempTargetId)
}
rpt.DataSource = s.GetQueryable<SearchResultItem>().Where(predicate);
rpt.DataBind();
}
I'm able to generate the facet and bind the result in Linkbutton within repeater control. Now I'm facing problem in generating the facet query with OR operator when the user selects more than 1 value of same facet type in Sitecore 7.
What can be done to solve it?
Thanks
Here's a blog post about solving this using PredicateBuilder with a specific code example:
http://www.nttdatasitecore.com/en/Blog/2013/November/Building-Facet-Queries-with-PredicateBuilder.aspx
To implement the Facet search in Sitecore use PredicateBuilder class to build the filter query and then add the filter query to the base query. Code is mentioned below:
List<PeopleFields> objPeoplefields = new List<PeopleFields>();
IQueryable<PeopleFields> Query = null;
var predicatePractice = Sitecore.ContentSearch.Utilities.PredicateBuilder.False<PeopleFields>();
var predicateOffice = Sitecore.ContentSearch.Utilities.PredicateBuilder.False<PeopleFields>();
using (var context = ContentSearchManager.GetIndex(SITECORE_WEB_INDEX).CreateSearchContext())
{
//Base query
Query = context.GetQueryable<PeopleFields>().Where(i => i.FirstName.StartsWith(txtFirstName.Text)).Where(i => i.LastName.StartsWith(txtLastName.Text));
foreach (string strselecteFacet in lstPracticefacetSelected)
{
//filter query
predicatePractice = predicatePractice.Or(x => x.Practice.Like(strselecteFacet));
}
foreach (string strselecteFacet in lstOfficefacetSelected)
{
//Filter query
predicateOffice = predicateOffice.Or(x => x.Office.Like(strselecteFacet));
}
//Joining the filter query alongwith base query
if (lstPracticefacetSelected.Count > 0 && lstOfficefacetSelected.Count > 0)
Query = Query.Filter(predicatePractice).Filter(predicateOffice);
else if (lstPracticefacetSelected.Count > 0 && lstOfficefacetSelected.Count == 0)
Query = Query.Filter(predicatePractice);
else if (lstPracticefacetSelected.Count == 0 && lstOfficefacetSelected.Count > 0)
Query = Query.Filter(predicateOffice);
objPeoplefields = Query.ToList();
}
As a quick way, if you're ok with having SitecoreUISearchResultItem as the query result type, you may be able to utilize the same method Sitecore 7 uses to parse queries entered in the content editor search:
Sitecore.Buckets.Util.UIFilterHelpers.ParseDatasourceString(string query)
If that's not up to what you're after, reading how it's implemented with a decompiler (ILSpy, DotPeek, Reflector, Resharper, etc) may help you in composing an expression manually based on dynamic criteria.
I am generating POCOs (lets say they are subclasses of MyEntityObject) by using a T4 template from an EDMX file.
I have 3 entities, e.g.:
MyTable1 (PrimaryKey: MyTable1ID)
MyTable2 (PrimaryKey: MyTable2ID)
MyTable3 (PrimaryKey: MyTable3ID)
These entities have the following relations:
MyTable1.MyTable1ID <=>
MyTable2.MyTable1ID (MyTable1ID is the
foreign key to MyTable1)
MyTable2.MyTable2ID <=>
MyTable3.MyTable2ID (MyTable2ID is the
foreign key to MyTable2)
Or in another view:
MyTable1 <= MyTable2 <= MyTable3
I want to extract all foreign key relations
NavigationProperty[] foreignKeys = entity.NavigationProperties.Where(np => np.DeclaringType == entity && ((AssociationType)np.RelationshipType).IsForeignKey).ToArray();
forewach (NavigationProperty foreignKey in foreignKeys)
{
// generate code....
}
My Question: How can I extract the column names that are linked between two entities?
Something like this:
void GetLinkedColumns(MyEntityObject table1, MyEntityObject table2, out string fkColumnTable1, out string fkColumnTable2)
{
// do the job
}
In the example
string myTable1Column;
string myTable2Column;
GetLinkedColumns(myTable1, myTable2, out myTable1Column, out myTable2Column);
the result should be
myTable1Column = "MyTable1ID";
myTable2Column = "MyTable2ID";
The first answer works if your foreign key columns are exposed as properties in your conceptual model. Also, the GetSourceSchemaTypes() method is only available in some of the text templates included with EF, so it is helpful to know what this method does.
If you want to always know the column names, you will need to load the AssociationType from the storage model as follows:
// Obtain a reference to the navigation property you are interested in
var navProp = GetNavigationProperty();
// Load the metadata workspace
MetadataWorkspace metadataWorkspace = null;
bool allMetadataLoaded =loader.TryLoadAllMetadata(inputFile, out metadataWorkspace);
// Get the association type from the storage model
var association = metadataWorkspace
.GetItems<AssociationType>(DataSpace.SSpace)
.Single(a => a.Name == navProp.RelationshipType.Name)
// Then look at the referential constraints
var toColumns = String.Join(",",
association.ReferentialConstraints.SelectMany(rc => rc.ToProperties));
var fromColumns = String.Join(",",
association.ReferentialConstraints.SelectMany(rc => rc.FromProperties));
In this case, loader is a MetadataLoader defined in EF.Utility.CS.ttinclude and inputFile is a standard string variable specifying the name of the .edmx file. These should already be declared in your text template.
Not sure exactly whether you want to generate code using the columns or not, but this may partly help to answer your question (How can I extract the column names that are linked between two entities?) ...
NavigationProperty[] foreignKeys = entity.NavigationProperties
.Where(np => np.DeclaringType == entity &&
((AssociationType)np.RelationshipType).IsForeignKey).ToArray();
foreach (NavigationProperty foreignKey in foreignKeys)
{
foreach(var rc in GetSourceSchemaTypes<AssociationType>()
.Single(x => x.Name == foreignKey.RelationshipType.Name)
.ReferentialConstraints)
{
foreach(var tp in rc.ToProperties)
WriteLine(tp.Name);
foreach(var fp in rc.FromProperties)
WriteLine(fp.Name);
}
}
This code works fine on my Visual Studio 2012
<## template language="C#" debug="true" hostspecific="true"#>
<## include file="EF.Utility.CS.ttinclude"#>
<#
string inputFile = #"DomainModel.edmx";
MetadataLoader loader = new MetadataLoader(this);
EdmItemCollection ItemCollection = loader.CreateEdmItemCollection(inputFile);
foreach (EntityType entity in ItemCollection.GetItems<EntityType>().OrderBy(e => e.Name))
{
foreach (NavigationProperty navProperty in entity.NavigationProperties)
{
AssociationType association = ItemCollection.GetItems<AssociationType>().Single(a => a.Name == navProperty.RelationshipType.Name);
string fromEntity = association.ReferentialConstraints[0].FromRole.Name;
string fromEntityField = association.ReferentialConstraints[0].FromProperties[0].Name;
string toEntity = association.ReferentialConstraints[0].ToRole.Name;
string toEntityField = association.ReferentialConstraints[0].ToProperties[0].Name;
}
}
#>
I'm using SharePoint web services in C#. I have my code working to check files and check them out using the Lists web service. I need to test to see if a file exists; I can find lots of examples for doing this using the object model API, but I can't seem to find a straightforward way of doing this using web services.
Try the Lists.GetListItems with a suitable CAML query.
A CAML query like
<Query><Where><Eq><FieldRef Name="FileLeafRef" /><Value Type="Text">Filename.rtf</Value></Eq></Where></Query>
should work; the field 'FileLeafRef' is where the filename is stored.
This code may do, it's a little rough, but demonstrates how to get a list of files based on the title.
public static bool PageExists(string listName, string webPath, string pageTitle)
{
string pageId = "";
IntranetLists.Lists lists = new IntranetLists.Lists();
lists.UseDefaultCredentials = true;
lists.Url = webPath + "/_vti_bin/lists.asmx";
XmlDocument doc = new XmlDocument();
doc.LoadXml("<Document><Query><Where><Contains><FieldRef Name=\"Title\" /><Value Type=\"Text\">" + pageTitle + "</Value></Contains></Where></Query><ViewFields /><QueryOptions /></Document>");
XmlNode listQuery = doc.SelectSingleNode("//Query");
XmlNode listViewFields = doc.SelectSingleNode("//ViewFields");
XmlNode listQueryOptions = doc.SelectSingleNode("//QueryOptions");
Guid g = GetWebID(webPath);
XmlNode items = lists.GetListItems(listName, string.Empty, listQuery, listViewFields, string.Empty, listQueryOptions, g.ToString());
}
return items.Count > 0;
}
public static XmlNodeList XpathQuery(XmlNode xmlToQuery, string xPathQuery)
{
XmlDocument doc = new XmlDocument();
doc.LoadXml(xmlToQuery.OuterXml);
XmlNamespaceManager mg = new XmlNamespaceManager(doc.NameTable);
mg.AddNamespace("sp", "http://schemas.microsoft.com/sharepoint/soap/");
mg.AddNamespace("z", "#RowsetSchema");
mg.AddNamespace("rs", "urn:schemas-microsoft-com:rowset");
mg.AddNamespace("y", "http://schemas.microsoft.com/sharepoint/soap/ois");
mg.AddNamespace("w", "http://schemas.microsoft.com/WebPart/v2");
mg.AddNamespace("d", "http://schemas.microsoft.com/sharepoint/soap/directory");
return doc.SelectNodes(xPathQuery, mg);
}
I also had similiar problems with this.
I have tried the following FieldRefs without success: "Name", "FileLeafRef" and "LinkFilenameNoMenu".
The post located at http://www.johanolivier.blogspot.com details what I had to do to get it working.