User Control Code For Paging In ASP.NET 3.5

Introduction

To privide smooth paging mechanism while delaing with huge quantitys of DATA.

Background

Below code snippet can be placed in a user control and can be reused as and when we require paging to be performed on a web UI.

The code

Code: C#.NET

Code:

private int GetItems()
{
	//create new instance of PagedDataSource
	PagedDataSource objPds = new PagedDataSource();
	//set number of pages will appear
	objPds.PageSize = PageSize;
	objPds.DataSource = Ods.Select();
	objPds.AllowPaging = true;
	int count = objPds.PageCount;


	objPds.CurrentPageIndex = CurrentPage;
	if (objPds.Count > 0)
	{
		//dispaly controls if there are pages
		btnPrevious.Visible = true;
		btnNext.Visible = true;
		btnLastRecord.Visible = true;
		btnFirstRecord.Visible = true;
		lblCurrentPage.Visible = true;
		lblCurrentPage.Text = "Page " + Convert.ToString(CurrentPage + 1) + " of " + Convert.ToString(objPds.PageCount);
	}
	else
	{
		//disable controls if there are no pages
		btnPrevious.Visible = false;
		btnNext.Visible = false;
		btnLastRecord.Visible = false;
		btnFirstRecord.Visible = false;
		lblCurrentPage.Visible = false;
	}
	btnPrevious.Enabled = !objPds.IsFirstPage;
	btnNext.Enabled = !objPds.IsLastPage;
	btnLastRecord.Enabled = !objPds.IsLastPage;
	btnFirstRecord.Enabled = !objPds.IsFirstPage;
	//check for object control if it a DataList
	//we will use DList Variable
	if (ObjectControl is DataList)
	{
		DList = (DataList)ObjectControl;
		DList.DataSource = objPds;
		DList.DataBind();
	}
	//check for object control if it a Repeater
	//we will use Rep Variable
	else if (ObjectControl is Repeater)
	{
		Rep = (Repeater)ObjectControl;
		Rep.DataSource = objPds;
		Rep.DataBind();
	}

	return count;
}
protected void btnPrevious_Click(object sender, EventArgs e)
{
	//back to previous page
	CurrentPage -= 1;
	GetItems();
}
protected void btnNext_Click(object sender, EventArgs e)
{
	//go to next page
	CurrentPage += 1;
	GetItems();
}

Thanks