How to create a Blank row in gridview

In some situations we need to add a blank row between GridView rows. The following program shows how to add a blank row between gridview rows.

insert a blank row in gridview

Database

In this article I have used Microsoft's Pubs database for sample data. You can download it free from the following link.

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How to insert blank row in gridview

In this program we retrieve data from Stor table and group it stor_id wise. When displaying this data in the GridView we insert a Blank Row when a stor_id change. For finding stor_id change, program capture each stor_id in the RowDataBound event.

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) { if (e.Row.RowType == DataControlRowType.DataRow) { storid = Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "stor_id").ToString()); } }

After capturing stor_id, it evaluate with previous stor_id and check if it is changed or not. If it is a new stor_id then program insert a new row in the RowCreated event. From the following program, you can understand how to insert new row in GridView.

Default.aspx

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <div> <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" Width="400px" onrowdatabound="GridView1_RowDataBound" onrowcreated="GridView1_RowCreated"> <Columns> <asp:BoundField DataField="stor_id" HeaderText="Store ID" /> <asp:BoundField DataField="ord_num" HeaderText="Order No." /> <asp:BoundField DataField="title_id" HeaderText="Title ID" /> <asp:BoundField DataField="qty" HeaderText="Quantity" ItemStyle-HorizontalAlign="Right"/> </Columns> </asp:GridView> </div> </form> </body> </html>

C# Source Code

using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Data.SqlClient; using System.Data; public partial class _Default : System.Web.UI.Page { int storid = 0; int rowIndex = 1; protected void Page_Load(object sender, EventArgs e) { SqlDataAdapter adapter = new SqlDataAdapter(); DataSet ds = new DataSet(); int i = 0; string sql = null; string connetionString = "Data Source=.;Initial Catalog=pubs;User ID=sa;Password=*****"; sql = "select distinct top 14 stor_id,ord_num,title_id,qty from sales group by stor_id,ord_num,title_id,qty"; SqlConnection connection = new SqlConnection(connetionString); connection.Open(); SqlCommand command = new SqlCommand(sql, connection); adapter.SelectCommand = command; adapter.Fill(ds); adapter.Dispose(); command.Dispose(); connection.Close(); GridView1.DataSource = ds.Tables[0]; GridView1.DataBind(); } protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) { if (e.Row.RowType == DataControlRowType.DataRow) { storid = Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "stor_id").ToString()); } } protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e) { bool newRow = false; if ((storid > 0) && (DataBinder.Eval(e.Row.DataItem, "stor_id") != null)) { if (storid != Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "stor_id").ToString())) newRow = true; } if ((storid > 0) && (DataBinder.Eval(e.Row.DataItem, "stor_id") == null)) { newRow = true; rowIndex = 0; } if (newRow) { AddNewRow(sender, e); } } public void AddNewRow(object sender, GridViewRowEventArgs e) { GridView GridView1 = (GridView)sender; GridViewRow NewTotalRow = new GridViewRow(0, 0, DataControlRowType.DataRow, DataControlRowState.Insert); NewTotalRow.Font.Bold = true; NewTotalRow.BackColor = System.Drawing.Color.Aqua; TableCell HeaderCell = new TableCell(); HeaderCell.Height = 10; HeaderCell.HorizontalAlign = HorizontalAlign.Center ; HeaderCell.ColumnSpan = 4; NewTotalRow.Cells.Add(HeaderCell); GridView1.Controls[0].Controls.AddAt(e.Row.RowIndex + rowIndex, NewTotalRow); rowIndex++; } }

VB.Net Source Code

Imports System.Drawing Imports System.Data.SqlClient Imports System.Data Partial Class _Default Inherits System.Web.UI.Page Private storid As Integer = 0 Private rowIndex As Integer = 1 Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Dim adapter As New SqlDataAdapter() Dim ds As New DataSet() Dim i As Integer = 0 Dim sql As String = Nothing Dim connetionString As String = "Data Source=.;Initial Catalog=pubs;User ID=sa;Password=*****" sql = "select distinct top 14 stor_id,ord_num,title_id,qty from sales group by stor_id,ord_num,title_id,qty" Dim connection As New SqlConnection(connetionString) connection.Open() Dim command As New SqlCommand(sql, connection) adapter.SelectCommand = command adapter.Fill(ds) adapter.Dispose() command.Dispose() connection.Close() GridView1.DataSource = ds.Tables(0) GridView1.DataBind() End Sub Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs) If e.Row.RowType = DataControlRowType.DataRow Then storid = Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "stor_id").ToString()) End If End Sub Protected Sub GridView1_RowCreated(ByVal sender As Object, ByVal e As GridViewRowEventArgs) Dim newRow As Boolean = False If (storid > 0) AndAlso (DataBinder.Eval(e.Row.DataItem, "stor_id") IsNot Nothing) Then If storid <> Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "stor_id").ToString()) Then newRow = True End If End If If (storid > 0) AndAlso (DataBinder.Eval(e.Row.DataItem, "stor_id") Is Nothing) Then newRow = True rowIndex = 0 End If If newRow Then AddNewRow(sender, e) End If End Sub Public Sub AddNewRow(ByVal sender As Object, ByVal e As GridViewRowEventArgs) Dim GridView1 As GridView = DirectCast(sender, GridView) Dim NewTotalRow As New GridViewRow(0, 0, DataControlRowType.DataRow, DataControlRowState.Insert) NewTotalRow.Font.Bold = True NewTotalRow.BackColor = System.Drawing.Color.Aqua Dim HeaderCell As New TableCell() HeaderCell.Height = 10 HeaderCell.HorizontalAlign = HorizontalAlign.Center HeaderCell.ColumnSpan = 4 NewTotalRow.Cells.Add(HeaderCell) GridView1.Controls(0).Controls.AddAt(e.Row.RowIndex + rowIndex, NewTotalRow) rowIndex += 1 End Sub End Class