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Error CS0815: Cannot assign null to an implicitly-typed variable Net-Framework/ASP_dot_Net-Core/Data-Model/Data-Errors
Error CS0815: Cannot assign null to an implicitly-typed variable
19.02.2021 115
Error CS0815: Cannot assign to an implicitly-typed variable When I'm trying to get into C's Asp Net Core Net5 to create a var variable var query=

Asp.Net Core SQL Server crashed at zero values Net-Framework/ASP_dot_Net-Core/Data-Model/Data-Errors
Asp.Net Core SQL Server crashed at zero values
19.02.2021 90
Problem: When an Asp Net Core application attaches data from a SQL server, data return often stops The cause is often the data model at sql null values In tables, integer numbers are often defined as zero on SQL Server

nvalidOperationException: The entity type Model requires a primary key to be defined Net-Framework/ASP_dot_Net-Core/Data-Model/Data-Errors
nvalidOperationException: The entity type Model requires a primary key to be defined
18.02.2021 98
An unhandled exception occurred while processing the request InvalidOperationException: The entity type 'myModel' requires a primary key to be defined If you intended to use a keyless entity type , call 'HasNoKey' in OnModelCreating Keyless entity types Sol

SQL Data Types   DateTime Date Time und TimeSpan in Asp.Net Excel Net-Framework/ASP_dot_Net-Core/Data-Model
SQL Data Types DateTime Date Time und TimeSpan in Asp.Net Excel
21.01.2021 169
SQL Data Types Converting Date Time Datentypes to C , JSON , and Excel SQL Server Datetimeoffset(7)

SQL Server Use Data Type time(7) Net-Framework/ASP_dot_Net-Core/Data-Model
SQL Server Use Data Type time(7)
21.01.2021 122
SQL Server Use Data Type time(7) How is a SQL Server data type Time(7) represented in the output -> Representation of a SQL server data type time becomes

Linq: Output to a variable list Net-Framework/ASP_dot_Net-Core/Data-Model/Linq
Linq: Output to a variable list
16.08.2018 1023
Linq: Output to a variable list How to pass the query results of a Linq query to a free list? Solution: with list and elements of type Object

Linq: Select Fields in Query Net-Framework/ASP_dot_Net-Core/Data-Model/Linq
Linq: Select Fields in Query
16.08.2018 2682
Linq: Select Fields in Query Error: object does not contain a definition for fieldname

the type or namespace name dbAppData_Context does not exist Net-Framework/ASP_dot_Net-Core/Data-Model/Linq
the type or namespace name dbAppData_Context does not exist
10.08.2018 1041
Problem: Occurs when updating the data model when updating the model at the WPF with an EF Entity Framework connection to a SQL Server database, then it may be that the connection is taken over incorrectly as a data context

Delete record in Linq Net-Framework/ASP_dot_Net-Core/Data-Model/Linq
Delete record in Linq
10.08.2018 1028
Delete record in Linq Code snippet: delete record call

Code snippet: Create Linq Select table from ID number fields Net-Framework/ASP_dot_Net-Core/Data-Model/Linq
Code snippet: Create Linq Select table from ID number fields
10.08.2018 1034
Code snippet: Create Linq Select table from ID number fields call

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