How to convert PDF to XLS from uploaded file (winforms) for PDF to excel API in C# with PDF.co Web API

How to convert PDF to XLS from uploaded file (winforms) for PDF to excel API in C#: Step By Step Tutorial

The coding tutorials are designed to help you test the features without need to write your own code. PDF to excel API in C# can be implemented with PDF.co Web API. PDF.co Web API is the Web API with a set of tools for documents manipulation, data conversion, data extraction, splitting and merging of documents. Includes image recognition, built-in OCR, barcode generation and barcode decoders to decode bar codes from scans, pictures and pdf.

C# code samples for C# developers help to speed up the application’s code writing when using PDF.co Web API. Open your C# project and simply copy & paste the code and then run your app! Use of PDF.co Web API in C# is also explained in the documentation included along with the product.

ByteScout free trial version is available for FREE download from our website. Programming tutorials along with source code samples are included.

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Form1.Designer.cs
      
namespace PdfToExcelFrom { partial class Form1 { /// <summary> /// Required designer variable. /// </summary> private System.ComponentModel.IContainer components = null; /// <summary> /// Clean up any resources being used. /// </summary> /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param> protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dispose(); } base.Dispose(disposing); } #region Windows Form Designer generated code /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { this.label1 = new System.Windows.Forms.Label(); this.txtCloudAPIKey = new System.Windows.Forms.TextBox(); this.label2 = new System.Windows.Forms.Label(); this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog(); this.txtInputPDFFileName = new System.Windows.Forms.TextBox(); this.btnSelectInputFile = new System.Windows.Forms.Button(); this.label3 = new System.Windows.Forms.Label(); this.cmbOutputAs = new System.Windows.Forms.ComboBox(); this.btnConvert = new System.Windows.Forms.Button(); this.label4 = new System.Windows.Forms.Label(); this.cmbConvertTo = new System.Windows.Forms.ComboBox(); this.SuspendLayout(); // // label1 // this.label1.AutoSize = true; this.label1.Location = new System.Drawing.Point(13, 13); this.label1.Name = "label1"; this.label1.Size = new System.Drawing.Size(165, 17); this.label1.TabIndex = 0; this.label1.Text = "ByteScout Cloud API Key"; // // txtCloudAPIKey // this.txtCloudAPIKey.Location = new System.Drawing.Point(184, 14); this.txtCloudAPIKey.Name = "txtCloudAPIKey"; this.txtCloudAPIKey.Size = new System.Drawing.Size(353, 22); this.txtCloudAPIKey.TabIndex = 1; // // label2 // this.label2.AutoSize = true; this.label2.Location = new System.Drawing.Point(13, 51); this.label2.Name = "label2"; this.label2.Size = new System.Drawing.Size(96, 17); this.label2.TabIndex = 2; this.label2.Text = "Input PDF File"; // // openFileDialog1 // this.openFileDialog1.FileName = "openFileDialog1"; this.openFileDialog1.FileOk += new System.ComponentModel.CancelEventHandler(this.openFileDialog1_FileOk); // // txtInputPDFFileName // this.txtInputPDFFileName.Location = new System.Drawing.Point(115, 48); this.txtInputPDFFileName.Name = "txtInputPDFFileName"; this.txtInputPDFFileName.Size = new System.Drawing.Size(290, 22); this.txtInputPDFFileName.TabIndex = 3; // // btnSelectInputFile // this.btnSelectInputFile.Font = new System.Drawing.Font("Microsoft Sans Serif", 7F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0))); this.btnSelectInputFile.Location = new System.Drawing.Point(411, 46); this.btnSelectInputFile.Name = "btnSelectInputFile"; this.btnSelectInputFile.Size = new System.Drawing.Size(126, 36); this.btnSelectInputFile.TabIndex = 4; this.btnSelectInputFile.Text = "Select input File"; this.btnSelectInputFile.UseVisualStyleBackColor = true; this.btnSelectInputFile.Click += new System.EventHandler(this.btnSelectInputFile_Click); // // label3 // this.label3.AutoSize = true; this.label3.Location = new System.Drawing.Point(13, 133); this.label3.Name = "label3"; this.label3.Size = new System.Drawing.Size(71, 17); this.label3.TabIndex = 5; this.label3.Text = "Output As"; // // cmbOutputAs // this.cmbOutputAs.FormattingEnabled = true; this.cmbOutputAs.Items.AddRange(new object[] { "URL to output file", "inline content"}); this.cmbOutputAs.Location = new System.Drawing.Point(107, 133); this.cmbOutputAs.Name = "cmbOutputAs"; this.cmbOutputAs.Size = new System.Drawing.Size(430, 24); this.cmbOutputAs.TabIndex = 6; // // btnConvert // this.btnConvert.Location = new System.Drawing.Point(16, 176); this.btnConvert.Name = "btnConvert"; this.btnConvert.Size = new System.Drawing.Size(194, 43); this.btnConvert.TabIndex = 7; this.btnConvert.Text = "Convert"; this.btnConvert.UseVisualStyleBackColor = true; this.btnConvert.Click += new System.EventHandler(this.btnConvert_Click); // // label4 // this.label4.AutoSize = true; this.label4.Location = new System.Drawing.Point(13, 93); this.label4.Name = "label4"; this.label4.Size = new System.Drawing.Size(78, 17); this.label4.TabIndex = 8; this.label4.Text = "Convert To"; // // cmbConvertTo // this.cmbConvertTo.FormattingEnabled = true; this.cmbConvertTo.Items.AddRange(new object[] { "XLS", "XLSX"}); this.cmbConvertTo.Location = new System.Drawing.Point(107, 93); this.cmbConvertTo.Name = "cmbConvertTo"; this.cmbConvertTo.Size = new System.Drawing.Size(430, 24); this.cmbConvertTo.TabIndex = 9; // // Form1 // this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(554, 255); this.Controls.Add(this.cmbConvertTo); this.Controls.Add(this.label4); this.Controls.Add(this.btnConvert); this.Controls.Add(this.cmbOutputAs); this.Controls.Add(this.label3); this.Controls.Add(this.btnSelectInputFile); this.Controls.Add(this.txtInputPDFFileName); this.Controls.Add(this.label2); this.Controls.Add(this.txtCloudAPIKey); this.Controls.Add(this.label1); this.Name = "Form1"; this.Text = "Cloud API: PDF to Excel Conversion"; this.ResumeLayout(false); this.PerformLayout(); } #endregion private System.Windows.Forms.Label label1; private System.Windows.Forms.TextBox txtCloudAPIKey; private System.Windows.Forms.Label label2; private System.Windows.Forms.OpenFileDialog openFileDialog1; private System.Windows.Forms.TextBox txtInputPDFFileName; private System.Windows.Forms.Label label3; private System.Windows.Forms.ComboBox cmbOutputAs; private System.Windows.Forms.Button btnConvert; private System.Windows.Forms.Button btnSelectInputFile; private System.Windows.Forms.Label label4; private System.Windows.Forms.ComboBox cmbConvertTo; } }

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Form1.cs
      
using Newtonsoft.Json.Linq; using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Diagnostics; using System.Drawing; using System.IO; using System.Net; using System.Text; using System.Windows.Forms; namespace PdfToExcelFrom { public partial class Form1 : Form { public Form1() { InitializeComponent(); } #region File Selection private void openFileDialog1_FileOk(object sender, CancelEventArgs e) { txtInputPDFFileName.Text = openFileDialog1.FileName; } private void btnSelectInputFile_Click(object sender, EventArgs e) { openFileDialog1.ShowDialog(); } #endregion #region Convert PDF to Excel /// <summary> /// Perform convert PDF to Excel /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnConvert_Click(object sender, EventArgs e) { try { if (ValidateInputs()) { // Comma-separated list of page indices (or ranges) to process. Leave empty for all pages. Example: '0,2-5,7-'. const string Pages = ""; // PDF document password. Leave empty for unprotected documents. const string Password = ""; // Checks whether convert to as inline content. bool isInline = Convert.ToString(cmbOutputAs.SelectedItem).ToLower() == "inline content"; // Destination file name string DestinationFile = string.Format(@".\{0}.{1}", Path.GetFileNameWithoutExtension(txtInputPDFFileName.Text), Convert.ToString(cmbConvertTo.SelectedItem).ToLower()); // Create standard .NET web client instance WebClient webClient = new WebClient(); // Set API Key webClient.Headers.Add("x-api-key", txtCloudAPIKey.Text.Trim()); // 1. RETRIEVE THE PRESIGNED URL TO UPLOAD THE FILE. // * If you already have a direct file URL, skip to the step 3. // Prepare URL for `Get Presigned URL` API call string query = Uri.EscapeUriString(string.Format( "https://api.pdf.co/v1/file/upload/get-presigned-url?contenttype=application/octet-stream&name={0}", Path.GetFileName(txtInputPDFFileName.Text))); // Execute request string response = webClient.DownloadString(query); // Parse JSON response JObject json = JObject.Parse(response); if (json["error"].ToObject<bool>() == false) { // Get URL to use for the file upload string uploadUrl = json["presignedUrl"].ToString(); string uploadedFileUrl = json["url"].ToString(); // 2. UPLOAD THE FILE TO CLOUD. webClient.Headers.Add("content-type", "application/octet-stream"); webClient.UploadFile(uploadUrl, "PUT", txtInputPDFFileName.Text); // You can use UploadData() instead if your file is byte[] or Stream webClient.Headers.Remove("content-type"); // 3. CONVERT UPLOADED PDF FILE TO Excel // Prepare URL for `PDF To Excel` API call query = Uri.EscapeUriString(string.Format( "https://api.pdf.co/v1/pdf/convert/to/{4}?name={0}&password={1}&pages={2}&url={3}&encrypt=true&inline={5}", Path.GetFileName(DestinationFile), Password, Pages, uploadedFileUrl, Convert.ToString(cmbConvertTo.SelectedItem).ToLower(), isInline)); // Execute request response = webClient.DownloadString(query); // Parse JSON response json = JObject.Parse(response); if (json["error"].ToObject<bool>() == false) { // Get URL of generated Excel file string resultFileUrl = json["url"].ToString(); // Download Excel output file webClient.DownloadFile(resultFileUrl, DestinationFile); MessageBox.Show({code}quot;Generated XLS file saved as {DestinationFile} file.", "Success!"); // Open Downloaded output file Process.Start(DestinationFile); } else { MessageBox.Show(json["message"].ToString()); } } else { MessageBox.Show(json["message"].ToString()); } webClient.Dispose(); } } catch (Exception ex) { MessageBox.Show(ex.Message, "Error"); } } /// <summary> /// Validates form inputs /// </summary> /// <returns></returns> private bool ValidateInputs() { if (string.IsNullOrEmpty(txtCloudAPIKey.Text)) { throw new Exception("Cloud API key cannot be empty"); } if (string.IsNullOrEmpty(txtInputPDFFileName.Text)) { throw new Exception("Input PDf file must be selected/entered."); } if (!System.IO.File.Exists(txtInputPDFFileName.Text)) { throw new Exception("Input file does not exits."); } if (System.IO.Path.GetExtension(txtInputPDFFileName.Text).ToLower() != ".pdf") { throw new Exception("Input file must be PDF"); } if (string.IsNullOrEmpty(Convert.ToString(cmbConvertTo.SelectedItem))) { throw new Exception("Please select convert to option."); } if (string.IsNullOrEmpty(Convert.ToString(cmbOutputAs.SelectedItem))) { throw new Exception("Please select output-as option"); } return true; } #endregion } }

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Program.cs
      
using System; using System.Collections.Generic; using System.Windows.Forms; namespace PdfToExcelFrom { static class Program { /// <summary> /// The main entry point for the application. /// </summary> [STAThread] static void Main() { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new Form1()); } } }

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packages.config
      
<?xml version="1.0" encoding="utf-8"?> <packages> <package id="Newtonsoft.Json" version="11.0.2" targetFramework="net20" /> </packages>

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