Merge Multiple Excel Files Present in Storage

This section demonstrates how to call the Web API service through a client application and merge multiple excel files available in file storage (remote storage or storage at the same server) to workbook.

Step 1: Call the Service

Step 2: Run the Client Project

The following example makes a call to the Web API service through HTML as well as WinForms client applications. These clients send a GET request to the service, which returns a response stream. This response stream is then saved in the desired excel file format.

In the following example, the service URL takes name and location of excel data files (present in storage) to merge in FileNamesToMerge parameter and the desired file format, xls, in Type parameter. The specified excel files to merge, reside in root folder of the hosted service.

Step 1: Call the Service

Complete the following steps to call the Web API service.

C#
HTML

Create a WinForms application, as discussed in Configure Client for REST API service. Add one C1Label, one C1TextBox and one C1Button control. Your form will appear as shown below.

Define a method (for example: MergeExcel()) in form class of your WinForms application, to call the service application, as shown below.

C#	Copy Code
public void MergeExcel() { var apiURL = "http://demos.componentone.com/ASPNET/WebAPI/api/excel/merge? FileName=excel&type=xls&FileNamesToMerge=root%%2FHouston.xlsx"; WebRequest request = WebRequest.Create(apiURL); WebResponse response = request.GetResponse(); var fileStream = File.Create("D:\\MergedFile.xls"); response.GetResponseStream().CopyTo(fileStream); }

Copy Code

public void MergeExcel() {
  var apiURL = "http://demos.componentone.com/ASPNET/WebAPI/api/excel/merge?
  FileName=excel&type=xls&FileNamesToMerge=root%%2FHouston.xlsx";
  WebRequest request = WebRequest.Create(apiURL);
  WebResponse response = request.GetResponse();
  var fileStream = File.Create("D:\\MergedFile.xls");
  response.GetResponseStream().CopyTo(fileStream);
}

Call the MergeExcel() method on button-click event of Merge Excel button.

Create an HTML application, as discussed in Configure Client for REST API service.

Add the following markups in the <form> tags, within <body> tags, of your HTML page.

HTML	Copy Code
<form action="http://demos.componentone.com/ASPNET/WebAPI/api/excel/merge" method="GET"> <label for="fileName">File Name:</label> <input type="text" id="fileName" name="fileName" value="MergedFile" /> <br /><br /> <label for="fileFormat">File Format:</label> <input type="text" id="fileFormat" name="type" value="xls" /> <br /><br /> <label for="FileNamesToMerge">File Names to Merge:</label> <input type="text" id="FileNamesToMerge" name="FileNamesToMerge" value="root/GAS.xls" /> <input type="text" id="FileNamesToMerge" name="FileNamesToMerge" value="root/Houston.xlsx" /> <input type="submit" value="Merge Excel"/> </form>

HTML

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<form action="http://demos.componentone.com/ASPNET/WebAPI/api/excel/merge" method="GET">
        <label for="fileName">File Name:</label>
        <input type="text" id="fileName" name="fileName" value="MergedFile" />
        <br /><br />
        <label for="fileFormat">File Format:</label>
        <input type="text" id="fileFormat" name="type" value="xls" />
        <br /><br />
        <label for="FileNamesToMerge">File Names to Merge:</label>
        <input type="text" id="FileNamesToMerge" name="FileNamesToMerge" value="root/GAS.xls" />
        <input type="text" id="FileNamesToMerge" name="FileNamesToMerge" value="root/Houston.xlsx" />
        <input type="submit" value="Merge Excel"/>
</form>

Note that, for GET request we set method attribute of <form> tag to GET, and set its action attribute to service request URL. Also, we create input controls on the HTML page, which take various parameters to merge multiple excel files, available in the storage, to the desired excel format.

Step 2: Run the Client Project

WinForms Application

Click Build | Build Solution to build the project.
Press F5 to run the project.
Provide the service URL, along with the query string containing appropriate parameters, in the textbox corresponding to Request URL field.
Click the Merge Excel button. The merged excel data stream will get downloaded at the location specified within the MergeExcel() method.

HTML Application

Save your HTML file and open it in a browser.
Set name and appropriate excel file format, and click Merge Excel button.

Explore detailed demo samples of REST API service to merge multiple excel files at:

Merge Excel Live Demo