I have run into very strange problem:
I have made extension method for string like this:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace Vaniv.Mvc
{
public static class StringHelpers
{
public static string ToSeoUrl(this string url)
{
// make the url lowercase
string encodedUrl = (url ?? "").ToLower();
System.Text.RegularExpressions.Regex rgx = new System.Text.RegularExpressions.Regex("[^a-zA-Z0-9 -]");
encodedUrl = rgx.Replace(encodedUrl, "-");
return encodedUrl;
}
}
}
And problem that durning runstime I get error:
CS0246: The type or namespace name 'Regex' could not be found (are you missing a using directive or an assembly reference?)
Im not missing using directive. Nor do I missing Assembly (I can use Regex withing controller for example).
I have put my extension method into App_Code, but doubt it have any connection,
Move the cs file to another directory (out of App_Code folder) put it on the root of the project.
Check this article
Related
I'm following a guide to write output data from Visual Studio into a google spreadsheet.
At the end of the guide there is a code block that I pasted inside my project:
using OpenQA.Selenium.Support.UI;
using System;
using NUnit.Framework;
using OpenQA.Selenium;
using System.Collections;
using System.Collections.Generic;
using Google.Apis.Sheets.v4;
using Google.Apis.Auth.OAuth2;
using System.IO;
using Google.Apis.Services;
using Newtonsoft.Json;
using WikipediaTests.Foundation_Class;
using System.Web;
using System.Data;
using Google.Apis.Sheets.v4.Data;
namespace AutomationProjects
{
[TestFixture]
public class TestClass : TestFoundation
{
public class SpreadSheetConnector
{
//Codeblock from guide pasted here!
}
[Test]
public void test1()
{
//Test case 1. Do XYZ...
}
}
}
In the code block included in the guide there is a section about creating a list and passing data into it:
// Pass in your data as a list of a list (2-D lists are equivalent to the 2-D spreadsheet structure)
public string UpdateData(List<IList<object>> data)
{
String range = "My Tab Name!A1:Y";
string valueInputOption = "USER_ENTERED";
// The new values to apply to the spreadsheet.
List<Data.ValueRange> updateData = new List<Data.ValueRange>();
var dataValueRange = new Data.ValueRange();
dataValueRange.Range = range;
dataValueRange.Values = data;
updateData.Add(dataValueRange);
Data.BatchUpdateValuesRequest requestBody = new Data.BatchUpdateValuesRequest();
requestBody.ValueInputOption = valueInputOption;
requestBody.Data = updateData;
var request = _sheetsService.Spreadsheets.Values.BatchUpdate(requestBody, _spreadsheetId);
Data.BatchUpdateValuesResponse response = request.Execute();
// Data.BatchUpdateValuesResponse response = await request.ExecuteAsync(); // For async
return JsonConvert.SerializeObject(response);
}
The problem is that I get an error for the 'Data.ValueRange' and the 'Data.BatchUpdateValuesRequest' :
CS0246 The type or namespace name 'Data' could not be found (are you missing a using directive or an assembly reference?)
I tried adding "System.Data" as a assembly reference to my project and then added it at the top (using). But it did not remove the error.
'Data.' seems to belong to "Google.Apis.Sheets.v4" but I have already added that reference as the guide instructed.
The only fix that gets rid of the error is adding Google.Apis.Sheets.v4 before every 'Data.' like this:
List<Google.Apis.Sheets.v4.Data.ValueRange>
But when I run my tests the output does not get exported to my spreadsheet. So I'm assuming this is not the correct solution. And also I'm assuming that the guide should have included this in the code block if it was necessary.
Could there be some other reference about 'Data' I need?
According to the documentation, the ValueRange Class depends of Sheets.v4.Data, so you should add:
using Google.Apis.Sheets.v4.Data;
Also, change:
List<Data.ValueRange> updateData = new List<Data.ValueRange>();
to:
List<ValueRange> updateData = new List<ValueRange>();
I am trying to build an sqlite database on xamarin(C#) in pcl project. I am following this tutorial. On the Android Implementation (Step5) i get these errors:
Error CS0104 'Environment' is an ambiguous reference between 'Android.OS.Environment' and 'System.Environment' AlarmSQLite.Android c:\users\thomas\source\repos\AlarmSQLite\AlarmSQLite\AlarmSQLite.Android\SQLite_Android.cs 30 Active
Error CS0234 The type or namespace name 'Net' does not exist in the namespace 'SQLite' (are you missing an assembly reference?) AlarmSQLite.Android c:\users\thomas\source\repos\AlarmSQLite\AlarmSQLite\AlarmSQLite.Android\SQLite_Android.cs 33 Active
I use VisualStudio2017. I tried to remove .Net and added System.Environment but i get more and new errors.
My code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using SQLite;
using Xamarin.Forms;
using AlarmSQLite.Droid;
using System.IO;
[assembly: Dependency(typeof(SQLite_Android))]
namespace AlarmSQLite.Droid
{
public class SQLite_Android : ISQLite
{
public SQLite_Android() { }
public SQLite.SQLiteConnection GetConnection()
{
var dbName = "AlarmDB.db3";
var documentsPath = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
var path = Path.Combine(documentsPath, dbName);
var platform = new SQLite.Net.Platform.XamarinAndroid.SQLitePlatformAndroid();
var connection = new SQLite.Net.SQLiteConnection(platform, path);
return connection;
}
}
}
Everything is the same with the tutorial. What am i doing wrong? Thank you!
New Errors:
Error CS0234 The type or namespace name 'Platform' does not exist in the namespace 'SQLite' (are you missing an assembly reference?) AlarmSQLite.Android C:\Users\Thomas\source\repos\AlarmSQLite\AlarmSQLite\AlarmSQLite.Android\SQLite_Android.cs 33 Active
Error CS0029 Cannot implicitly convert type 'SQLite.Net.SQLiteConnection' to 'SQLite.SQLiteConnection' AlarmSQLite.Android C:\Users\Thomas\source\repos\AlarmSQLite\AlarmSQLite\AlarmSQLite.Android\SQLite_Android.cs 36 Active
Error CS0104:
Environment comes from 'Android.OS.Environment' as well as 'System.Environment' so giving you and ambiguity issue. Just Prepend System to the Environment.
var documentsPath = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal);
Error CS0234: Seems like you haven't added SQLite-Async Nuget Package. You have to add this in your PCL as well as in Android project and build project again.
Error CS0234 & CS0029: Make sure you added following two nuget packages in android and pcl projects.
Then, instead of using Sqlite, try to use Sqlite.Net.
Your Final Code should Look :
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Xamarin.Forms;
using AlarmSQLite.Droid;
using System.IO;
using SQLite.Net;
using SQLite.Net.Async;
[assembly: Dependency(typeof(SQLite_Android))]
namespace AlarmSQLite.Droid
{
public class SQLite_Android : ISQLite
{
public SQLite_Android() { }
public SQLiteConnection GetConnection()
{
var dbName = "AlarmDB.db3";
var documentsPath = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal);
var path = Path.Combine(documentsPath, dbName);
var platform = new SQLite.Net.Platform.XamarinAndroid.SQLitePlatformAndroid();
var connection = new SQLiteConnection(platform, path);
return connection;
}
}
}
Do not forget to adjust your interface for the same. It should be like:
SQLiteConnection GetConnection():
Note: You can omit Sqlite.Net.Async PCL reference if you don't need it.
I am trying to show an instance of PluginManagerView with the below code.
This XAML file is in the same namespace, same project. But I got an error at the line of mainwindow.Show(); saying that
Error 1 'PluginManager.PluginManagerView' does not contain a definition for 'Show' and no extension method 'Show' accepting a first argument of type 'PluginManager.PluginManagerView' could be found (are you missing a using directive or an assembly reference?) Blah procedyre .cs 30 24 PluginManager
Can anyone tell me about what the problem is? And why doesn't it throw the error for the prior usages of MainWindow?
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Windows;
using System.ComponentModel.Composition.Hosting;
namespace PluginManager
{
public class PublicProcedures : Application
{
public static void ShowPlugins()
{
var mainwindow = new PluginManagerView();
//An aggregate catalog that combines multiple catalogs
var catalog = new AggregateCatalog();
//Adds all the parts found in the same assembly as the Program class
//catalog.Catalogs.Add(new AssemblyCatalog(this.GetType().Assembly));
catalog.Catalogs.Add(new DirectoryCatalog("./Plugins/"));
var container = new CompositionContainer(catalog);
var modules = container.GetExportedValues<IPlugin>();
mainwindow.DataContext = modules;
mainwindow.Show();
}
}
}
In order to call Window.Show (which i guess is what you want to do), PluginManagerView would have to be derived from class Window, and its XAML would have to look somehow like this:
<Window x:Class="PluginManager.PluginManagerView" ...>
...
</Window>
It is complaining that whatever PluginManagerView is, it doesn't have a Show method (which you're trying to call in an instance of PluginManagerView called "mainwindow").
Im getting the error "the type or namespace name 'Entity' could not be found" from the following code snippet.
So ive added the reference "System.Data.Entity" but its still not working...
Why is that?
Error 1 The type or namespace name 'Entity' could not be found (are you missing a using directive or an assembly reference?)...
using System;
using System.Linq;
using GDataDB;
using GDataDB.Linq;
using System.Data.Entity;
....
Console.WriteLine("Connecting");
var client = new DatabaseClient("you#gmail.com", "password");
const string dbName = "testing";
Console.WriteLine("Opening or creating database");
var db = client.GetDatabase(dbName) ?? client.CreateDatabase(dbName);
const string tableName = "testtable";
Console.WriteLine("Opening or creating table");
var t = db.GetTable<Entity>(tableName) ?? db.CreateTable<Entity>(tableName);
Console.WriteLine("Feed url for this table is '{0}'", t.GetFeedUrl());
var all = t.FindAll();
Console.WriteLine("{0} elements", all.Count);
....
There is no using System.Data.Entity; in the GDataDB sample app, and never has been, so either you or some automated tool added it.
So simply remove it.
If you're missing the Entity type, make sure you get the whole sample project and not just Program.cs
GDataDB has no relationship to EF or LINQ-to-SQL at all.
The official tutorial from http://www.antlr.org/wiki/display/ST/Five+minute+Introduction doesn't work because of DefaultTemplateLexer, how to fix ?
using System;
using Antlr.StringTemplate;
class Script
{
static public void Main(string[] args)
{
StringTemplateGroup group = new StringTemplateGroup("myGroup", #"C:\Tutorials\stringtemplate", typeof(DefaultTemplateLexer));
StringTemplate helloAgain = group.GetInstanceOf("homepage");
helloAgain.SetAttribute("title", "Welcome To StringTemplate");
helloAgain.SetAttribute("name", "World");
helloAgain.SetAttribute("friends", "Terence");
helloAgain.SetAttribute("friends", "Kunle");
helloAgain.SetAttribute("friends", "Micheal");
helloAgain.SetAttribute("friends", "Marq");
Console.Out.WriteLine(helloAgain.ToString());
}
}
From the tutorial, you didn't include the using line:
using Antlr.StringTemplate.Language;
Which imports the namespace that DefaultTemplateLexer resides in. So either include that line or fully qualify the type.