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(C#) QR Code Generator via api.qrserver.com REST APISee more HTTP ExamplesDemonstrates how to generate a QR code using the api.qrserver.com REST API service. For more information, see https://goqr.me/api/doc/create-qr-code/
// This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. Chilkat.Http http = new Chilkat.Http(); bool success; // Send the following GET request to get a binary response. // The body of the binary response contains the image data for the QR code. // https://api.qrserver.com/v1/create-qr-code/?data=[URL-encoded-text]&size=[pixels]x[pixels] Chilkat.JsonObject queryParams = new Chilkat.JsonObject(); queryParams.UpdateString("data","Hello World"); queryParams.UpdateString("size","100x100"); // Get a PNG file.. // Possible formats are: // png // gif // jpeg // jpg // svg // eps // Case matters. Use lowercase. queryParams.UpdateString("format","png"); // Send the GET request to an endpoint. // Chilkat will add the url-encoded query params passed in the JSON. Chilkat.HttpResponse resp = http.QuickRequestParams("GET","https://api.qrserver.com/v1/create-qr-code/",queryParams); if (http.LastMethodSuccess == false) { Debug.WriteLine(http.LastErrorText); return; } // Did it succeed? if (resp.StatusCode != 200) { // The response body, if anything, would not be the image data, but would likely be the error text (or HTML, or whatever...) Debug.WriteLine(resp.BodyStr); Debug.WriteLine("Response status = " + Convert.ToString(resp.StatusCode)); Debug.WriteLine("Failed."); return; } // Success if we get here.. // Save the binary body as the PNG file, or you can get the bytes of the PNG.. success = resp.SaveBodyBinary("c:/temp/qa_output/qr_code.png"); // Or get the bytes: Chilkat.BinData bd = new Chilkat.BinData(); resp.GetBodyBd(bd); // Use the bytes in bd... // See the online reference documentation for the function to access the bytes directly. Debug.WriteLine("Success."); |
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