Add support for chart.js version parameter (#4)

QuickChart/QuickChart.cs

@@ -22,6 +22,7 @@ namespace QuickChart
         public string Format { get; set; }
         public string BackgroundColor { get; set; }
         public string Key { get; set; }
+        public string Version { get; set; }
         public string Config { get; set; }
 
         public string Scheme { get; set; }
@@ -62,6 +63,10 @@ namespace QuickChart
             {
                 builder.Append("&key=").Append(Uri.EscapeDataString(Key));
             }
+            if (!string.IsNullOrEmpty(Version))
+            {
+                builder.Append("&v=").Append(Uri.EscapeDataString(Version));
+            }
 
             return $"{Scheme}://{Host}:{Port}/chart?{builder}";
         }
@@ -85,6 +90,7 @@ namespace QuickChart
                 format = Format,
                 chart = Config,
                 key = Key,
+                version = Version,
             }, options);
 
             string url = $"{Scheme}://{Host}:{Port}/chart/create";
@@ -123,6 +129,7 @@ namespace QuickChart
                 format = Format,
                 chart = Config,
                 key = Key,
+                version = Version,
             }, options);
 
             string url = $"{Scheme}://{Host}:{Port}/chart";

QuickChartTest/QuickChartTest.cs

@@ -86,5 +86,32 @@ namespace QuickChartTest
             Assert.Contains("h=300", url);
             Assert.Contains("f=svg", url);
         }
+
+        [Fact]
+        public void TestWithVersion()
+        {
+            Chart qc = new Chart
+            {
+                Width = 500,
+                Height = 300,
+                Format = "2.9.4",
+                Config = @"{
+                type: 'bar',
+                data: {
+                    labels: ['Q1', 'Q2', 'Q3', 'Q4'],
+                    datasets: [{
+                        label: 'Users',
+                        data: [50, 60, 70, 180]
+                    }]
+                }
+            }"
+            };
+
+            string url = qc.GetUrl();
+            Assert.Contains("https://quickchart.io:443/chart", url);
+            Assert.Contains("w=500", url);
+            Assert.Contains("h=300", url);
+            Assert.Contains("v=2.9.4", url);
+        }
     }
 }

README.md

@@ -26,6 +26,7 @@ Chart qc = new Chart();
 
 qc.Width = 500;
 qc.Height = 300;
+qc.Version = "2.9.4";
 qc.Config = @"{
     type: 'bar',
     data: {
@@ -80,6 +81,9 @@ The device pixel ratio of the chart. This will multiply the number of pixels by
 #### Format: string
 The output format of the chart. Defaults to "png"
 
+#### Version: string
+Chart.js version (not required)
+
 #### Key: string
 API key (not required)