IList<T> to Excel file
An extension method that produce a excel file of List<T>. This would be useful if you want to automatically generate a Excel out of any other primative data type collection I provided 1 overloads of this method, that accepts a Path as string to save excel file to location on disk.
Source
/// <summary>
/// Extension method to write list data to excel.
/// </summary>
/// <typeparam name="T">Ganeric list</typeparam>
/// <param name="list"></param>
/// <param name="PathToSave">Path to save file.</param>
public static void ToExcel<T>(this List<T> list, string PathToSave)
{
#region Declarations
if (string.IsNullOrEmpty(PathToSave))
{
throw new Exception("Invalid file path.");
}
else if(PathToSave.ToLower().Contains("")==false)
{
throw new Exception("Invalid file path.");
}
if (list == null)
{
throw new Exception("No data to export.");
}
Excel.Application excelApp = null;
Excel.Workbooks books = null;
Excel._Workbook book = null;
Excel.Sheets sheets = null;
Excel._Worksheet sheet = null;
Excel.Range range = null;
Excel.Font font = null;
// Optional argument variable
object optionalValue = Missing.Value;
string strHeaderStart = "A2";
string strDataStart = "A3";
#endregion
#region Processing
try
{
#region Init Excel app.
excelApp = new Excel.Application();
books = (Excel.Workbooks)excelApp.Workbooks;
book = (Excel._Workbook)(books.Add(optionalValue));
sheets = (Excel.Sheets)book.Worksheets;
sheet = (Excel._Worksheet)(sheets.get_Item(1));
#endregion
#region Creating Header
Dictionary<string, string> objHeaders = new Dictionary<string, string>();
PropertyInfo[] headerInfo = typeof(T).GetProperties();
foreach (var property in headerInfo)
{
var attribute = property.GetCustomAttributes(typeof(DisplayNameAttribute), false)
.Cast<DisplayNameAttribute>().FirstOrDefault();
objHeaders.Add(property.Name, attribute == null ?
property.Name : attribute.DisplayName);
}
range = sheet.get_Range(strHeaderStart, optionalValue);
range = range.get_Resize(1, objHeaders.Count);
range.set_Value(optionalValue, objHeaders.Values.ToArray());
range.BorderAround(Type.Missing, Excel.XlBorderWeight.xlThin, Excel.XlColorIndex.xlColorIndexAutomatic, Type.Missing);
font = range.Font;
font.Bold = true;
range.Interior.Color = Color.LightGray.ToArgb();
#endregion
#region Writing data to cell
int count = list.Count;
object[,] objData = new object[count, objHeaders.Count];
for (int j = 0; j < count; j++)
{
var item = list[j];
int i = 0;
foreach (KeyValuePair<string, string> entry in objHeaders)
{
var y = typeof(T).InvokeMember(entry.Key.ToString(), BindingFlags.GetProperty, null, item, null);
objData[j, i++] = (y == null) ? "" : y.ToString();
}
}
range = sheet.get_Range(strDataStart, optionalValue);
range = range.get_Resize(count, objHeaders.Count);
range.set_Value(optionalValue, objData);
range.BorderAround(Type.Missing, Excel.XlBorderWeight.xlThin, Excel.XlColorIndex.xlColorIndexAutomatic, Type.Missing);
range = sheet.get_Range(strHeaderStart, optionalValue);
range = range.get_Resize(count + 1, objHeaders.Count);
range.Columns.AutoFit();
#endregion
#region Saving data and Opening Excel file.
if (string.IsNullOrEmpty(PathToSave) == false)
book.SaveAs(PathToSave);
excelApp.Visible = true;
#endregion
#region Release objects
try
{
if (sheet != null)
System.Runtime.InteropServices.Marshal.ReleaseComObject(sheet);
sheet = null;
if (sheets != null)
System.Runtime.InteropServices.Marshal.ReleaseComObject(sheets);
sheets = null;
if (book != null)
System.Runtime.InteropServices.Marshal.ReleaseComObject(book);
book = null;
if (books != null)
System.Runtime.InteropServices.Marshal.ReleaseComObject(books);
books = null;
if (excelApp != null)
System.Runtime.InteropServices.Marshal.ReleaseComObject(excelApp);
excelApp = null;
}
catch (Exception ex)
{
sheet = null;
sheets = null;
book = null;
books = null;
excelApp = null;
}
finally
{
GC.Collect();
}
#endregion
}
catch (Exception ex)
{
throw ex;
}
#endregion
}
Example
public class DummyData
{
[DisplayName("# ID")]
public string ID { get; set; }
[DisplayName("Full Name")]
public string Name { get; set; }
public string Address { get; set; }
public string Age { get; set; }
}
private void button1_Click(object sender, EventArgs e)
{
List<DummyData> dataList = new List<DummyData>();
for (int i = 0; i < 10; i++)
{
dataList.Add(new DummyData()
{
Address = "Addresss " + i,
Age = "Age " + i,
ID = "ID " + i,
Name = "Name " + i
});
}
dataList.ToExcel("C:\\test.xls");
}
Author: Saurabh dubey
Submitted on: 5 dec. 2011
Language: C#
Type: System.Collections.Generic.IList<T>
Views: 15878