Is caching PDF Files a good or bad idea
If the PDF files are on the disk, you should just let the IIS handle them. The IIS static file handler performs caching and is much faster than the ASP.NET cache.
How can I get the value of input box with type hidden in code-behind
You can set the runat= server for the hidden control and you can use ControlName.Value to get its value in CodeBehind file
How do I resolve the error ‘The server rejected one or more recipient addresses. The server response was: 503 This mail server requires authentication. Please check your mail client settings’
CDOSYS supports username and password authentication, and version 1.1 of the .NET Framework added the Fields property to the MailMessage class, which lets you set arbitrary fields of the underlying CDOSYS object. Refer Extending System.Web.Mail
How to set a Datagrid Column to invisible when that Column is an AutoGeneratedColumn
In the DataGrid’s declaration, add the following code in OnItemDataBound event VB.NET Dim dv As DataView = DataGrid1.DataSource ’Bind you DataGrid1 in Page_Load to DataView Dim dc As DataColumnCollection = dv.Table.Columns e.Item.Cells(dc.IndexOf(dc(‘field_name))).Visible = false C# DataView dv = DataGrid1.DataSource ;//Bind you DataGrid1 in Page_Load to DataView DataColumnCollection dc = dv.Table.Columns; e.Item.Cells[dc.IndexOf(dc[‘field_name’])].Visible = false;
I have created a .NET user control page (.ascx) but I cannot compile and run it.
User control (ascx) can’t be run on it own, but you can drag it onto any web page (aspx) and then run it.