CSharp -- Examples -- Use CsvHelper library

Author: jannesiera

Diff for: Dash.NET.Giraffe.CSharp.Example/Dash.NET.Giraffe.CSharp.Example.csproj

@@ -1,10 +1,14 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>net5.0</TargetFramework>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="CsvHelper" Version="27.1.1" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\Dash.NET.CSharp.Giraffe\Dash.NET.CSharp.Giraffe.fsproj" />
     <ProjectReference Include="..\Dash.NET.CSharp\Dash.NET.CSharp.fsproj" />

Diff for: Dash.NET.Giraffe.CSharp.Example/Program.cs

@@ -11,44 +11,29 @@
 using System.Linq;
 using System.Globalization;
 using Microsoft.FSharp.Core;
+using System.Net.Http;
+using CsvHelper;
 
 namespace Dash.Giraffe.CSharp.Example
 {
-    class Program
+    class Iris
     {
-        static string GetCSV(string url)
-        {
-            var req = (HttpWebRequest)WebRequest.Create(url);
-            var resp = (HttpWebResponse)req.GetResponse();
-
-            var sr = new StreamReader(resp.GetResponseStream());
-            var results = sr.ReadToEnd();
-            sr.Close();
-
-            return results;
-        }
+        public decimal sepal_length { get; set; }
+        public decimal sepal_width { get; set; }
+        public decimal petal_length { get; set; }
+        public decimal petal_width { get; set; }
+        public string species { get; set; }
+        public int species_id { get; set; }
+    }
 
+    class Program
+    {
         static void Main(string[] args)
         {
             // Read and parse CSV
 
-            var csv = GetCSV("https://raw.githubusercontent.com/plotly/datasets/master/iris-id.csv");
-            var rows = csv
-                .Split("\r\n")
-                .Skip(1) // Skip header
-                .SkipLast(1) // Skip empty line after split
-                .Select(x => x.Split(","))
-                .Select(x =>
-                    new {
-                        sepal_length = decimal.Parse(x[0], CultureInfo.InvariantCulture.NumberFormat),
-                        sepal_width = decimal.Parse(x[1], CultureInfo.InvariantCulture.NumberFormat),
-                        petal_length = decimal.Parse(x[2], CultureInfo.InvariantCulture.NumberFormat),
-                        petal_width = decimal.Parse(x[3], CultureInfo.InvariantCulture.NumberFormat),
-                        species = x[4],
-                        species_id = int.Parse(x[5], CultureInfo.InvariantCulture.NumberFormat),
-                    }
-                )
-                .ToList();
+            var csv = new StreamReader(new HttpClient().GetStreamAsync("https://raw.githubusercontent.com/plotly/datasets/master/iris-id.csv").Result);
+            var rows = new CsvReader(csv, CultureInfo.InvariantCulture).GetRecords<Iris>().ToList();
 
             // Use plotly charts
 

Diff for: Dash.NET.Giraffe.CSharp.Tests/Dash.NET.Giraffe.CSharp.Documentation.Examples.csproj

@@ -5,6 +5,10 @@
     <TargetFramework>net5.0</TargetFramework>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="CsvHelper" Version="27.1.1" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\Dash.NET.CSharp.Giraffe\Dash.NET.CSharp.Giraffe.fsproj" />
     <ProjectReference Include="..\Dash.NET.CSharp\Dash.NET.CSharp.fsproj" />

Diff for: Dash.NET.Giraffe.CSharp.Tests/Layout_ReusableComponents.cs

@@ -4,26 +4,21 @@
 using static Dash.NET.CSharp.Dsl;
 using System.Linq;
 using Dash.NET.CSharp.Giraffe;
+using System.IO;
+using System.Net.Http;
+using CsvHelper;
+using System.Globalization;
 
 namespace Documentation.Examples
 {
     class Layout_ReusableComponents
     {
         public static void RunExample()
         {
-            List<string> splitted = new List<string>();
-            var csv = Program.GetCSV("https://gist.githubusercontent.com/chriddyp/c78bf172206ce24f77d6363a2d754b59/raw/c353e8ef842413cae56ae3920b8fd78468aa4cb2/usa-agricultural-exports-2011.csv");
-            var headers = csv
-                .Split("\n")
-                .First()
-                .Split(",");
-            var rows = csv
-                .Split("\n")
-                .Skip(1)
-                .SkipLast(1)
-                .Select(x => x.Split(","))
-                .ToList();
-
+            var csv = new HttpClient().GetStringAsync("https://gist.githubusercontent.com/chriddyp/c78bf172206ce24f77d6363a2d754b59/raw/c353e8ef842413cae56ae3920b8fd78468aa4cb2/usa-agricultural-exports-2011.csv").Result;
+            var rows = csv.Split("\n").SkipLast(1).Select(x => x.Split(","));
+            var headers = rows.First();
+            var data = rows.Skip(1);
 
             var layout =
                 Html.div(
@@ -38,7 +33,7 @@ public static void RunExample()
                                 ),
                                 Html.tbody(
                                     Attr.children(
-                                        rows.Select(x => Html.tr(Attr.children(x.Select(x => Html.td(Attr.children(x))))))
+                                        data.Select(x => Html.tr(Attr.children(x.Select(x => Html.td(Attr.children(x))))))
                                     )
                                 )
                             )

Diff for: Dash.NET.Giraffe.CSharp.Tests/Program.cs

@@ -15,24 +15,12 @@ namespace Documentation.Examples
 {
     class Program
     {
-        public static string GetCSV(string url)
-        {
-            var req = (HttpWebRequest)WebRequest.Create(url);
-            var resp = (HttpWebResponse)req.GetResponse();
-
-            var sr = new StreamReader(resp.GetResponseStream());
-            var results = sr.ReadToEnd();
-            sr.Close();
-
-            return results;
-        }
-
         static void Main(string[] args)
         {
-            Layout_FirstExample.RunExample();
+            //Layout_FirstExample.RunExample();
             //Layout_MoreAboutHtmlComponents.RunExample();
             //Layout_Markdown.RunExample();
-            //Layout_ReusableComponents.RunExample();
+            Layout_ReusableComponents.RunExample();
         }
     }
 }