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Thursday, May 17, 2012

Add a Drop Down List into Excel File using C# .NET

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Here is sample code to add a drop down list into an Excel File using C# .NET.
Before you adding this codes, make sure you have add the Microsoft Excel Object Library from COM as reference into your project.

Here are the codes:

using Microsoft.Office.Interop.Excel ;
protected void Button1_Click(object sender, EventArgs e)
string Filename = "samp.xls";
Application xlsApp = new Application();
Workbook xlsWorkbook;
Worksheet xlsWorksheet;
object oMissing = System.Reflection.Missing.Value;

//Create new workbook
xlsWorkbook = xlsApp.Workbooks.Add(true);

//Get the first worksheet
xlsWorksheet = (Worksheet)(xlsWorkbook.Worksheets[1]);

string[] ddl_item = { "Answers", "Autos", "Finance", "Games", "Groups", "HotJobs",
"Maps", "Mobile Web", "Movies", "Music", "Personals", "Real Estate", "Shopping", "Sports",
"Tech", "Travel", "TV", "Yellow Pages" };

Range xlsRange;
xlsRange = xlsWorksheet.get_Range("A1", "A1");

DropDowns xlDropDowns;
DropDown xlDropDown;
xlDropDowns = ((DropDowns)(xlsWorksheet.DropDowns(oMissing)));
xlDropDown = xlDropDowns.Add((double)xlsRange.Left, (double)xlsRange.Top, (double)xlsRange.Width, (double)xlsRange.Height, true);

//Add item into drop down list
for (int i = 0; i < ddl_item.Length; i++)
xlDropDown.AddItem(ddl_item[i], i + 1);

xlsApp.DisplayAlerts = false;
xlsWorkbook.Close(true, Filename, null);

xlsWorksheet = null;
xlsWorkbook = null;
xlsApp = null;


Current file is saved in My Documents [C:\Users\\Documents]

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