Alphabet Paging in GridView

In this sample we can implement alphabetic paging for the gridview.

GridView Markup

<form id="form1" runat="server">
<div>
<asp:GridView ID="GridView1" runat="server" ShowFooter="True"OnRowCreated="GridView1_RowCreated"
OnRowCommand="GridView1_RowCommand">
</asp:GridView>
</div>
</form>

 

Code Behind

public partial class AlphabetPaging : System.Web.UI.Page

{
protected void Page_Load(object sender, EventArgs e)
{

if (!IsPostBack)
{
if (Session["strTemp"] != null)
{

GridView1.DataSource = Session["strTemp"] as DataTable;

GridView1.DataBind();

}
else
{
GridView1.DataSource = GetCustomMadeDataTable();
GridView1.DataBind();
}
}

}
public DataTable GetCustomMadeDataTable()
{

//Create a new DataTable object
System.Data.DataTable objDataTable = new System.Data.DataTable();
//Create three columns with string as their type
objDataTable.Columns.Add("Id", typeof(string));
objDataTable.Columns.Add("Column1", typeof(string));
objDataTable.Columns.Add("Column2", typeof(string));
objDataTable.Columns.Add("Column3", typeof(string));

//Adding some data in the rows of this DataTable
DataRow dr;
for (int i = 65; i <= (65 + 25); i++)
{

dr = objDataTable.NewRow();
dr[0] = i.ToString();
dr[1] = Char.ConvertFromUtf32(i)+"Column1Data" + i.ToString();
dr[2] = Char.ConvertFromUtf32(i+1)+"Column2Data" + i.ToString();
dr[3] = Char.ConvertFromUtf32(i+2)+"Column3Data" + i.ToString();
objDataTable.Rows.Add(dr);


}
DataColumn[] dcPk = new DataColumn[1];
dcPk[0] = objDataTable.Columns["Id"];
objDataTable.PrimaryKey = dcPk;
Session["strTemp"] = objDataTable;


return objDataTable;
}
protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.Footer)
{

TableCell cell = e.Row.Cells[0];
cell.ColumnSpan = 2;

for (int i = 65; i <= (65 + 25); i++)
{
LinkButton lb = new LinkButton();

lb.Text = Char.ConvertFromUtf32(i) + " ";

lb.CommandArgument = "%" + Char.ConvertFromUtf32(i) + "%";
lb.CommandName = "AlphaPaging";

cell.Controls.Add(lb);

}
}
}
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
//At first I check that if the CommandName is “AlphaPaging”
if (e.CommandName.Equals("AlphaPaging"))
{

GridView1.DataSource = GetById(e.CommandArgument.ToString());
GridView1.DataBind();
}
}

public DataView GetById(string id)
{

//Fetch record from database using like operator.
DataTable dt = new DataTable();
dt = Session["strTemp"] as DataTable;
DataView dv = dt.DefaultView;

dv.RowFilter = "Column1 LIKE '" + id + "'";
return dv;


}
}