To export data from an `ExpandoObject` to an Excel file in C#, you can use a library like EPPlus, which allows you to work with Excel files in a straightforward manner. EPPlus is available as a NuGet package. Here's how you can use it to export data to an Excel file:
1. **Install EPPlus**:
In your C# project, use NuGet Package Manager to install the EPPlus library:
```bash
Install-Package EPPlus
```
2. **Create and Export Data**:
Here's a sample code to export data from an `ExpandoObject` to an Excel file using EPPlus:
```csharp
using System;
using System.Collections.Generic;
using System.Dynamic;
using OfficeOpenXml;
class Program
{
static void Main(string[] args)
{
var data = new List<ExpandoObject>
{
new ExpandoObject(),
new ExpandoObject(),
};
// You can add properties to the ExpandoObject here, for example:
// ((dynamic)data[0]).FirstName = "John";
// ((dynamic)data[0]).LastName = "Doe";
ExportToExcel(data, "output.xlsx");
}
static void ExportToExcel(List<ExpandoObject> data, string fileName)
{
using (var package = new ExcelPackage())
{
var worksheet = package.Workbook.Worksheets.Add("Sheet1");
var rowIndex = 1;
// Assuming the properties are the same for all ExpandoObjects
var properties = ((IDictionary<string, object>)data[0]).Keys;
// Create header row
foreach (var property in properties)
{
worksheet.Cells[rowIndex, properties.ToList().IndexOf(property) + 1].Value = property;
}
rowIndex++;
// Populate data rows
foreach (var item in data)
{
var rowData = (IDictionary<string, object>)item;
foreach (var property in properties)
{
worksheet.Cells[rowIndex, properties.ToList().IndexOf(property) + 1].Value = rowData[property];
}
rowIndex++;
}
package.SaveAs(new System.IO.FileInfo(fileName));
}
}
}
```
3. **Modify the `data` List**:
In this example, the `data` List contains two `ExpandoObject` instances. You can add properties and data to these objects according to your requirements.
4. **Specify the Output File**:
The `ExportToExcel` method exports the data to an Excel file named "output.xlsx" in the current directory. You can change the `fileName` parameter to specify a different output file path.
This example is a basic starting point for exporting data from `ExpandoObject` to an Excel file. You can expand upon it to match your specific data and formatting needs.