C#, read sheets names from Excel (*.xls) file

var file = Server.MapPath("file.xls");

var cs = string.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties=Excel 8.0;", file);

using(var conn = new OleDbConnection(cs))

{

	conn.Open();

	var table = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);

	var sheets = table.Rows.Cast().Select(x => x["TABLE_NAME"]).ToList();

	grid.DataSource = sheets;

	grid.DataBind();

}

MVC 3: disable browser cache

public class NoCache : ActionFilterAttribute
{
 public override void OnResultExecuting(ResultExecutingContext filterContext)
 {
  filterContext.HttpContext.Response.Cache.SetExpires(DateTime.UtcNow.AddDays(-1));
  filterContext.HttpContext.Response.Cache.SetValidUntilExpires(false);
  filterContext.HttpContext.Response.Cache.SetRevalidation(HttpCacheRevalidation.AllCaches);
  filterContext.HttpContext.Response.Cache.SetCacheability(HttpCacheability.NoCache);
  filterContext.HttpContext.Response.Cache.SetNoStore();

  base.OnResultExecuting(filterContext);
 }
}

ExtJS 4: Wrap Renderer

wrapRenderer: function (value, metadata) {
    metadata.style = 'white-space: normal';
    return value;
}