entity framework - Linq to Entities Select clause with lambda -

-

I am working on a new project and we are using unit framework and god leads when lambda Would like to use questions. One thing is that we want to take a hard time to choose how to choose two columns in addition to how to choose differently, we have a table in which there are many entries for a vendor but we only list the vendors and a dictionary Want to load in the object. This fails because it is trying to add a significant value in writing that has already been added. Take the following query Dictionary & lt; Int, string & gt; Dict = new dictionary & lt; Int, string & gt; (); Dict = GetWamVendorInfo (). AsEnumerable (). Where (x => x.vendor_name! = Null & x.vendor_id! = Null) //. Selection (x = & gt; x.vendor_id). (Undoubtedly). (2). Todoquin (o => gt; purse (o.vender_id.ToString ()), o = & gt; o.vander_name);

What I would like to do, only select vendor_id and vendor so that we can only get specific records.

Any help would be greatly appreciated.

Thanks,

Rhonda

An anonymous type Experiment: 

  // The first bit of query. Select (x = & gt; new {seller = x.vendor_id, VendorName = xVendor_name}). Undoubtedly () .Oxisation (O => O. VanderID, O => O. Vandernam);   
 I removed the call on  take (2) , because it was not clear why you want it - and the  seller ID , Which I was already expecting to be an integer type.  
 Note that you should remove approximately  definitely   asenumerable  calls from your query - currently you  all  Vendors will bring and filter with the object from LINQ. There is no point in making any blank dictionary and then ignoring it completely. I should have your full query:  
  var vendors = GetWamVendorInfo (). Select (x = & gt; new {seller ID = x.vendor_id, VendorName = x.vendor_name}). Undoubtedly (). Oignity (o => O. vendor ID, o => O. vender name);   
 On the one hand, you should ask your god  why  wants to use Lambda expression everywhere (in opposition to possibly query expressions), different syntax options Using different conditions ends with a more readable code - it is advisable to be flexible on this front.

Comments

Post a Comment

Popular posts from this blog

mysql - BLOB/TEXT column 'value' used in key specification without a key length -

-
I have developed an extension which works up to 1.6 on Magren (I'm trying Enterprise Edition, And I think the community is the same problem, because it is the same code). In my install script, I see the $ installer-> gt; CreateEntityTables ($ this- & gt; getTable ('alphanum / info')); The installation is done until it is not in the _text unit table. It crashed there! It turns out that when I log in to SQL and run it via PHPmyadmin, then this error is: Blob / Text column 'value' is used without the key 'key' . I saw the code there, and this is what is trying to create an index on the value column: -> addIndex ($ this- & gt; getIdxName ($ eavTableName, array ( 'attribute_id array (' attribute_id ',' value ')) - & gt; addIndex ($ this- & gt; getIdxName ($ eavTableName, array (' entity_type_id ' , 'Value')), array ('entity_type_id', 'value')) If there is no if statement is n...
Read more

c# - Using Vici cool Storage with monodroid -

-
Oh, for the moment I am not sure how it is officially supported, but for the success of the people Using Monodroid Vic Cool Storage I am able to leave and compile assemblies in my project, but while trying to use some classes, the errors of time have to be gathered. Especially when trying to connect like the example for Mono Touch string dbName = path. Cobain (environment. Gatefolder path (environment specialfolder personal), "mydb.db3"); // The following line will be called coolestation, where is the database, // to make it if it does not exist, and call a delegate that creates the necessary tables (only when the database file was newly created //) CSConfig.SetDB (DbName, true, () => {CSDatabase.ExecuteNonQuery ("Subscriber Integer Primary Key Attribute, Name Text (50) No, Number, Date First Text (30)");); There is no difference when I try to use the methods of CSConfig and when I cscfif If I try to pass 3 aggregates to STDB (3) then I get the invalid ...
Read more

python - referencing a variable in another function? -

-
I am an experienced TCL developer and write my own processes to help myself. I call it a proc i callVar, print out the value of the variable in a certain format, so I know that it is variable and what is the value "set foo 1; putVar foo" result 'foo = "1" I want to do the same thing in Python, but I can not find the answer :( In TCL I use the up command because when I pass the name of the variable, then I can see the value at the top. . I understand that an advanced light in the dragon There is no mechanism of r, but with its introspection capability, I would think that this is something trivial, but I am not getting the answer anywhere. It seems that this should work: and expanded: def foo (): y = "Hello World" printwor ("y") foo () y = "Hello World " You can, but you should not do so if your code is correct If is needed , then there is something wrong with your design, and you should probably use the dictionar...
Read more