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Net-Framework/WPF/Entity-Framework How to add a database functionally to a WPF application 16.11.2018 62 How to add a database functionally to a WPF application If you already have a WPF application with a local database, then you go in the Solution Explorer Add data model connection At Project-> Add-> New Item Net-Framework/Visual-Studio/Error Gelöst: One or more projects in the solution were not loaded correctly 16.11.2018 51 Gelöst: One or more projects in the solution were not loaded correctly Die Fehlermeldung dass das Projekt nicht richtig geladen werden konnte, wenn man ein Projekt über eine Solution sln Datei öffnet und das Projekt zuvor verschoben wurde Net-Framework/WinForms/Code Code: Resize Photo with Windows, Resize 14.11.2018 49 Code: Resize Photo with Windows, Resize Task: A small easy Windows C # code to downsize a photo or image to a smaller size Net-Framework/WinForms/Errors Solved: Thread must be set to Single Thread Apartment (STA) mode 14.11.2018 39 Solved: Thread must be set to Single Thread Apartment (STA) mode Problem: When using the Clipboard clipboard in an Addin Net-Framework/WPF/Controls-Elements WPF Datagrid: Column is not displayed 13.11.2018 48 WPF Datagrid: Column is not displayed Problem: Net-Framework/Visual-Studio/Error Resolved: Error message when installing Windows software, untrusted certificate 12.11.2018 45 Resolved: Error message when installing Windows software, untrusted certificate Problem: When installing a Windows application, the following message appears saying that custom functions can not be used because of a certificate Net-Framework/ASP_dot_Net-Core/Errors Installation of .NET Core 2.1 on a web server 07.11.2018 73 Installation of NET Core 2 1 on a web server Problem: If you upload a new web page with Asp Net Core 2 1 to a web server and try to start it, then first an error message 502 5 appears on the web server Net-Framework/Visual-Studio/Error Asp.Net Core 2.1 Error: Publish prints too many files 07.11.2018 55 Asp Net Core 2 1 Error: Publish prints too many files Problem: If you output an Asp Net Core 2 1 Web application with Publish, project files and all library runtime files will be output Subject: Upgrade Windows 10 update and Visual Studio 2017 to 2018 Q3 De&# Net-Framework/ASP_dot_Net-Core/Code-Example/Razor Asp.Net Razor: Query website URL Path 06.11.2018 47 How to query in Asp Net when calling a page where you are? Task: I would like to call the website page: Edit, that some HTML sections such as advertising are not displayed The Asp Net MVC Core Website Edit is saved as View: E Net-Framework/Visual-Studio/Error Solved: Project file is incomplete. Expected imports are missing. .Net Core 2 Project 06.11.2018 54 Solved: Project file is incomplete Expected imports are missing Net Core 2 Project When opening the Project Solution sln file with a core project, Windows 10 reports a fatal error The project file will not load at all As such, the project or the project Net-Framework/c_hash_/Basics C #: Converting a 2D Object Array to 2D String Array 30.10.2018 68 C #: Converting a 2D Object Array to 2D String Array Task: This code example in C # shows how to transform a two-dimensional object [,] array into a 2-dimensional string [,] array T Net-Framework/Controls/COM-ActiveX Create C# COM Control for Office 10.10.2018 242 Create COM Control for Office This description shows how to create a COM Control and then use it in Microsoft Office The COM Control is created in C # in Visual Studio The description contains the base code in C # for creating a COM control The COM Control is cr Net-Framework/WPF/Code-Samples Read text from PDF using iTextSharp 10.10.2018 205 Read text from PDF Under C # you can create a complete PDF reader with just a few lines of code For this you can integrate the Nuget Package iTextSharp small Windows program with iTextSharp in C # and WPF Net-Framework/ASP_dot_Net-Core/Angular/Errors Error AggregateException: The NPM start exited without the Angular CLI was listening for requests 03.09.2018 1198 Error AggregateException: The NPM script start exited without the Angular CLI was listening for requests Th Net-Framework/ASP_dot_Net-Core/Angular Angular.js SPA app under Visual Studio and Asp.Net 03.09.2018 189 Angular js SPA app under Visual Studio and Asp Net How to create a simple Asp Net Core application with Angular js as frontend Net-Framework/ASP_dot_Net-Core/Errors Set upload of very large files in Asp.Net MVC Core 2. 24.08.2018 1177 Set upload of very large files in Asp Net MVC Core 2 Problem: If you want to upload large files or videos with 200 MB or 1 5 GB in asp net core 2 1 Net-Framework/WPF/Error-Messages Error: A second operation started in this context before a previous asynchronous operation completed. 20.08.2018 665 Error: A second operation started in this context before a previous asynchronous operation completed Error: Net-Framework/WPF/Error-Messages Error: Can not implicitly convert type System.Threading.Tasks.Task long to long 20.08.2018 209 Error: Can not implicitly convert type 'System Threading Tasks Task ' to 'long' Not correct: Net-Framework/WPF/Entity-Framework Error: The underlying provider failed on Open.EntityFramework Entity Framework 20.08.2018 232 Error: The underlying provider failed on Open EntityFramework Entity Framework Error message: Net-Framework/WPF/Code-Samples Send emails with WPF 17.08.2018 173 Send emails with WPF With the following code sample you can easily send emails in WPF applications Net-Framework/ASP_dot_Net-Core/Project-Setup Expand Asp.Net Core Startup.cs with Environment Development 17.08.2018 171 Task: How can you build a case distinction between development state and runtime publish state in the Startup cs file in Asp Net Core project Net-Framework/ASP_dot_Net-Core/Data-Model/Linq Linq: Output to a variable list 16.08.2018 152 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 Net-Framework/ASP_dot_Net-Core/Data-Model/Linq Linq: Select Fields in Query 16.08.2018 202 Linq: Select Fields in Query Error: object does not contain a definition for fieldname Net-Framework/ASP_dot_Net-Core/Data-Model/Linq the type or namespace name dbAppData_Context does not exist 10.08.2018 135 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 Net-Framework/ASP_dot_Net-Core/Data-Model/Linq Delete record in Linq 10.08.2018 156 Delete record in Linq Code snippet: delete record call Net-Framework/ASP_dot_Net-Core/Data-Model/Linq Code snippet: Create Linq Select table from ID number fields 10.08.2018 139 Code snippet: Create Linq Select table from ID number fields call Net-Framework/WPF/HTML-Documents Evaluate Json in WPF 09.08.2018 185 Evaluate Json in WPF Task: I would like to evaluate a Json return from a website in WPF Net-Framework/ASP_dot_Net-Core/API Json error: A method was called at an unexpected time 09.08.2018 212 Json error: A method was called at an unexpected time Problem: When evaluating an Api interface which returns a pure value list, the error comes that the method was called at an unexpected time Solution: When evaluating Json re Net-Framework/ASP_dot_Net-Core/API StatusCode: 405, ReasonPhrase: Method Not Allowed 09.08.2018 294 StatusCode: 405, ReasonPhrase: "Method Not Allowed" Problem: when accessing an Api-Delete interface from WPF on Asp Net Core MVC, the response StatusCode 405 Net-Framework/WPF/HTML-Documents httpClient Error: There is no mapped character in the multi-byte codepage for the Unicode character. HRESULT: 0x80070459 08.08.2018 198 There is no mapped character in the multi-byte codepage for the Unicode character (Exception from HRESULT: 0x80070459) Problem: W