I am using GTK#, TreeView and TreeStore. I can get each value in one row by calling GetValue() one by one for each value. But this seems inefficient if the TreeStore has a lot of columns. There is GetValist() methods which is for retrieving all the values at once, but I have no idea how to use it. GTK# has no documentation. The method's signature is public void GetValist(TreeIter iter, IntPtr var_args). How to use it? Should I give up and just use GetValue()?
private TreeStore MyStore = new(typeof(string), typeof(int), typeof(string));
var it = MyStore.AppendValues("hello", 1234, "world");
var val1 = MyStore.GetValue(it, 0);
Debug.WriteLine(val1);
var val2 = MyStore.GetValue(it, 1);
Debug.WriteLine(val2);
var val3 = MyStore.GetValue(it, 2);
Debug.WriteLine(val3);
var mem = Marshal.AllocHGlobal(1000);
MyStore.GetValist(it, mem); //crash
Related
I'm trying to use repository pattern for my vsto project.
How do I use a repository pattern to execute a stored procedure? I'm using Entity Framework. Any link for code sample would really useful
To your generic repository add
public IEnumerable<T> ExecWithStoreProcedure(string query, params object[] parameters)
{
return _context.Database.SqlQuery<T>(query, parameters);
}
And then you can call it with any unitofwork/repository like
IEnumerable<Products> products =
_unitOfWork.ProductRepository.ExecWithStoreProcedure(
"spGetProducts #bigCategoryId",
new SqlParameter("bigCategoryId", SqlDbType.BigInt) { Value = categoryId }
);
A non generic solution in your repository would be:
private int ExecWithStoreProcedure(string query, params object[] parameters)
{
return _context.Database.ExecuteSqlCommand("EXEC " + query, parameters);
}
And then a few typical examples of use:
var param = new SqlParameter("SomethingToCheck", SqlDbType.NVarChar) { Value = shortCode };
var result = ExecWithStoreProcedure("mySchema.myStoredProc #SomethingToCheck", param);
with multiple parameters:
var param1 = new SqlParameter("SomeCode", SqlDbType.VarChar) { Value = shortCode };
var param2 = new SqlParameter("User", SqlDbType.VarChar) { Value = userName };
var result = ExecWithStoreProcedure("mySchema.myStoredProc #SomeCode, #User", param1, param2 );
this link guided me. [Link]
But when you execute stored procedure you have to put "exec" informant of SP name
Eg: if sp is "sp_aa"
string should be "exec sp_aa"
SO follow this example
example and how make a fake DBContex For test my test using just this work fine
[Test]
public void CiudadIndex()
{
var ciudades = new FakeDbSet<Ciudad>
{
new Ciudad {CiudadId = 1, EmpresaId =1, Descripcion ="Santa Cruz", FechaProceso = DateTime.Now, MarcaBaja = null, UsuarioId = 1},
new Ciudad {CiudadId = 2, EmpresaId =1, Descripcion ="La Paz", FechaProceso = DateTime.Now, MarcaBaja = null, UsuarioId = 1},
new Ciudad {CiudadId = 3, EmpresaId =1, Descripcion ="Cochabamba", FechaProceso = DateTime.Now, MarcaBaja = null, UsuarioId = 1}
};
//// Create mock unit of work
var mockData = new Mock<IContext>();
mockData.Setup(m => m.Ciudades).Returns(ciudades);
// Setup controller
var homeController = new CiudadController(mockData.Object);
// Invoke
var viewResult = homeController.Index();
var ciudades_de_la_vista = (IEnumerable<Ciudad>)viewResult.Model;
// Assert..
}
Iam tryign now to use Autofixture-Moq
to create "ciudades" but I cant. I try this
var fixture = new Fixture();
var ciudades = fixture.Build<FakeDbSet<Ciudad>>().CreateMany<FakeDbSet<Ciudad>>();
var mockData = new Mock<IContext>();
mockData.Setup(m => m.Ciudades).Returns(ciudades);
I get this error
Cant convert System.Collections.Generic.IEnumerable(FakeDbSet(Ciudad)) to System.Data.Entity.IDbSet(Ciudad)
cant put "<>" so I replace with "()" in the error message
Implementation of IContext and FakeDbSet
public interface IContext
{
IDbSet<Ciudad> Ciudades { get; }
}
public class FakeDbSet<T> : IDbSet<T> where T : class
how can make this to work?
A minor point... In stuff like:
var ciudades_fixture = fixture.Build<Ciudad>().CreateMany<Ciudad>();
The second type arg is unnecessary and should be:
var ciudades_fixture = fixture.Build<Ciudad>().CreateMany();
I really understand why you need a FakeDbSet and the article is a bit TL;DR... In general, I try to avoid faking and mucking with ORM bits and instead dealing with interfaces returning POCOs to the max degree possible.
That aside... The reason the normal syntax for initialising the list works is that there is an Add (and IEnumerable) in DBFixture. AutoFixture doesn't have a story for that pattern directly (after all it is compiler syntactic sugar and not particularly amenable to reflection or in line with any other conventions) but you can use AddManyTo as long as there is an ICollection in play. Luckily, within the impl of FakeDbSet as in the article, the following gives us an in:-
public ObservableCollection<T> Local
{
get { return _data; }
}
As ObservableCollection<T> derives from ICollection<T>, you should be able to:
var ciudades = new FakeDbSet<Cuidad>();
fixture.AddManyTo(ciudades.Local);
var mockData = new Mock<IContext>();
mockData.Setup(m => m.Ciudades).Returns(ciudades);
It's possible to wire up a customization to make this prettier, but at least you have a way to manage it. The other option is to have something implement ICollection (or add a prop with a setter taking IEnumerable<T> and have AF generate the parent object, causing said collection to be filled in.
Long superseded side note: In your initial question, you effectively have:
fixture.Build<FakeDbSet<Ciudad>>().CreateMany()
The problem becomes clearer then - you are asking AF to generate Many FakeDbSet<Ciudad>s, which is not what you want.
I haven't used AutoFixture in a while, but shouldn't it be:
var ciudades = new FakeDbSet<Ciudad>();
fixture.AddManyTo(ciudades);
for the moment I end doing this, I will keep reading about how use automoq, cause I'm new in this
var fixture = new Fixture();
var ciudades_fixture = fixture.Build<Ciudad>().CreateMany<Ciudad>();
var ciudades = new FakeDbSet<Ciudad>();
foreach (var item in ciudades_fixture)
{
ciudades.Add(item);
}
var mockData = new Mock<IContext>();
fixture.Create<Mock<IContext>>();
mockData.Setup(r => r.Ciudades).Returns(ciudades);
I'm trying to call a stored procedure from EntityFramework which uses Table-value parameter.
But when I try to do function import I keep getting a warning message saying -
The function 'InsertPerson' has a parameter 'InsertPerson_TVP' at
parameter index 0 that has a data type 'table type' which is currently
not supported for the target .NET Framework version. The function was
excluded.
I did a initial search here and found few posts which says It's possible in EntityFrameWork with some work arounds and few saying it's not supported in current versions.
Does any one know a better approach or solution for this problem?
I ended up doing this, Please note we are working on EF DataContext(not ObjectContext)
Executing a Stored procedure with output parameter
using (DataContext context = new DataContext())
{
////Create table value parameter
DataTable dt = new DataTable();
dt.Columns.Add("Displayname");
dt.Columns.Add("FirstName");
dt.Columns.Add("LastName");
dt.Columns.Add("TimeStamp");
DataRow dr = dt.NewRow();
dr["Displayname"] = "DisplayName";
dr["FirstName"] = "FirstName";
dr["LastName"] ="LastName";
dr["TimeStamp"] = "TimeStamp";
dt.Rows.Add(dr);
////Use DbType.Structured for TVP
var userdetails = new SqlParameter("UserDetails", SqlDbType.Structured);
userdetails.Value = dt;
userdetails.TypeName = "UserType";
////Parameter for SP output
var result = new SqlParameter("ResultList", SqlDbType.NVarChar, 4000);
result.Direction = ParameterDirection.Output;
context.Database.ExecuteSqlCommand("EXEC UserImport #UserDetails, #ResultList OUTPUT", userdetails, result);
return result == null ? string.Empty : result.Value.ToString();
}
My Table-Value-Parameter (UDT Table) script looks like this:
CREATE TYPE [dbo].[UserType] AS TABLE (
[DisplayName] NVARCHAR (256) NULL,
[FirstName] NVARCHAR (256) NULL,
[LastName] NVARCHAR (256) NULL,
[TimeStamp] DATETIME NULL
)
And my store procedure begins like
CREATE PROCEDURE UserImport
-- Add the parameters for the stored procedure here
#UserDetails UserType Readonly,
#ResultList NVARCHAR(MAX) output
AS
For Stored procedure without output parameter we don't need any ouput parameter added/passed to SP.
Hope it helps some one.
Perhaps we could also consider the SqlQuery method:
[Invoke]
public SomeResultType GetResult(List<int> someIdList)
{
var idTbl = new DataTable();
idTbl.Columns.Add("Some_ID");
someIdList.ForEach(id => idTbl.Rows.Add(id));
var idParam = new SqlParamter("SomeParamName", SqlDbType.Structured);
idParam.TypeName = "SomeTBVType";
idParam.Value = idTbl;
// Return type will be IEnumerable<T>
var result = DbContext.Database.SqlQuery<SomeResultType>("EXEC SomeSPName, #SomeParamName", idParam);
// We can enumerate the result...
var enu = result.GetEnumerator();
if (!enu.MoveNext()) return null;
return enu.Current;
}
var detailTbl = new DataTable();
detailTbl.Columns.Add("DetailID");
detailTbl.Columns.Add("Qty");
txnDetails.ForEach(detail => detailTbl.Rows.Add(detail.DetailID, detail.Qty));
var userIdParam = new System.Data.SqlClient.SqlParameter("#UserID", SqlDbType.Int);
userIdParam.Value = 1;
var detailParam = new System.Data.SqlClient.SqlParameter("#Details", SqlDbType.Structured);
detailParam.TypeName = "DetailUpdate";
detailParam.Value = detailTbl;
var txnTypeParam = new System.Data.SqlClient.SqlParameter("#TransactionType", SqlDbType.VarChar);
txnTypeParam.Value = txnType;
var result = await db.Database.ExecuteSqlCommandAsync("MySP #UserID, #Details, #TransactionType", userIdParam, detailParam, txnTypeParam);
if(result >= 0)
return StatusCode(HttpStatusCode.OK);
else
return StatusCode(HttpStatusCode.InternalServerError);
Thought this would be pretty straight forward, but my value is remaining the same (0).
What I'd like to do is increment my UnreadMessages field when the user receives a message they haven't read and then decrement it when they have. So I thought code like this would work:
var userHelper = new MongoHelper<User>();
//increment
userHelper.Collection.Update(Query.EQ("Id", userId.ToId()), Update.Inc("UnreadMessages", 1));
//decrement
userHelper.Collection.Update(Query.EQ("Id", userId.ToId()), Update.Inc("UnreadMessages", -1));
After running these no errors are thrown but the value doesn't change either. And no I'm not running one after the other as the code above could be interpreted :)
Update
Here's my helper class:
public class MongoHelper<T> : Sandbox.Services.IMongoHelper<T> where T : class
{
public MongoCollection<T> Collection { get; private set; }
public MongoHelper()
{
var con = new MongoConnectionStringBuilder(ConfigurationManager.ConnectionStrings["MongoDB"].ConnectionString);
var server = MongoServer.Create(con);
var db = server.GetDatabase(con.DatabaseName);
Collection = db.GetCollection<T>(typeof(T).Name.ToLower());
}
}
and thanks to Travis' answer I was able to pull this off:
MongoHelper<UserDocument> userHelper = new MongoHelper<UserDocument>();
var user = userHelper.Collection.FindAndModify(Query.EQ("Username", "a"), SortBy.Null, Update.Inc("MessageCount", 1), true).GetModifiedDocumentAs<UserDocument>();
Not sure what your helper does. Here is a working snippet I use:
var query = Query.And(Query.EQ("_id", keyName));
var sortBy = SortBy.Null;
var update = Update.Inc("KeyValue", adjustmentAmount);
var result = collection.FindAndModify(query, sortBy, update, true);
So, "query" finds the document, update does the increment, and FindAndModify puts them together and actually hits the database.
I am attempting to use Newtonsoft.Json.Net35 Version 4.0.2.0 to deserialize an ADO.NET DataTable that contains null values. Serialization works fine:
[Test]
public void SerializeDataTableWithNull()
{
var table = new DataTable();
table.Columns.Add("item");
table.Columns.Add("price", typeof(double));
table.Rows.Add("shirt", 49.99);
table.Rows.Add("pants", 54.99);
table.Rows.Add("shoes"); // no price
var json = JsonConvert.SerializeObject(table);
Assert.AreEqual(#"["
+ #"{""item"":""shirt"",""price"":49.99},"
+ #"{""item"":""pants"",""price"":54.99},"
+ #"{""item"":""shoes"",""price"":null}]", json);
}
Deserialization works fine if values are missing:
[Test]
public void DerializeDataTableWithImplicitNull()
{
const string json = #"["
+ #"{""item"":""shirt"",""price"":49.99},"
+ #"{""item"":""pants"",""price"":54.99},"
+ #"{""item"":""shoes""}]";
var table = JsonConvert.DeserializeObject<DataTable>(json);
Assert.AreEqual("shirt", table.Rows[0]["item"]);
Assert.AreEqual("pants", table.Rows[1]["item"]);
Assert.AreEqual("shoes", table.Rows[2]["item"]);
Assert.AreEqual(49.99, (double)table.Rows[0]["price"], 0.01);
Assert.AreEqual(54.99, (double)table.Rows[1]["price"], 0.01);
Assert.IsInstanceOf(typeof(System.DBNull), table.Rows[2]["price"]);
}
If, however, values are explicitly null:
[Test]
public void DerializeDataTableWithExplicitNull()
{
const string json = #"["
+ #"{""item"":""shirt"",""price"":49.99},"
+ #"{""item"":""pants"",""price"":54.99},"
+ #"{""item"":""shoes"",""price"":null}]";
var table = JsonConvert.DeserializeObject<DataTable>(json);
Assert.AreEqual("shirt", table.Rows[0]["item"]);
Assert.AreEqual("pants", table.Rows[1]["item"]);
Assert.AreEqual("shoes", table.Rows[2]["item"]);
Assert.AreEqual(49.99, (double)table.Rows[0]["price"], 0.01);
Assert.AreEqual(54.99, (double)table.Rows[1]["price"], 0.01);
Assert.IsInstanceOf(typeof(System.DBNull), table.Rows[2]["price"]);
}
DeserializeObject throws "System.ArgumentException : Cannot set Column 'price' to be null. Please use DBNull instead." The following workaround works for my particular JSON:
var regex = new Regex(#",?""[_\w]+"":null");
var nullless = regex.Replace(json, string.Empty);
var table = JsonConvert.DeserializeObject<DataTable>(nullless);
but like all regular expression-based kludges this is clearly brittle.
Finally, the questions:
Is this a bug?
Json.NET has many events that can be hooked. Is there a way to get notified when a when a null value is encountered and explicitly set the value to System.DBNull?
Thanks in advance,
Frank
It looks like this is a bug which is easily fixed by replacing
dr[columnName] = reader.Value
with
dr[columnName] = reader.Value ?? System.DBNull.Value
in Newtonsoft.Json.Converters.DataTableConverter. I have entered an issue in the tracker.