How to add grid view columns by code behind/Add columns by programmatically/Add columns by server side

This code snippet show you how to add grid view columns by programmatically but nor actually by the design.

ASPX

<asp:GridView ID="Grid" runat="server" Width="100%" AutoGenerateColumns="False" OnInit="Grid_Init">

<HeaderStyle CssClass="spn_gridheader" />

<RowStyle CssClass="spn_gridrow" />                                  

<PagerStyle  HorizontalAlign="Right" ForeColor="#009900" VerticalAlign="Middle" />

</asp:GridView>

ASPX.CS

At grid view initialization,

protected void Grid_Init(object sender, EventArgs e)

        {

            Grid.AutoGenerateColumns = false;

            Grid.HeaderStyle.HorizontalAlign = HorizontalAlign.Right;

            BoundField date = CreateBoundField("Date","Header name","format"}");

            BoundField month = CreateBoundField("Month","Header name","format"}");

            BoundField year = CreateBoundField("Year","Header name","format"}");

             

              //Styling header columns

            date.ItemStyle.HorizontalAlign = HorizontalAlign.Right;

            month.ItemStyle.HorizontalAlign = HorizontalAlign.Left;

            year.ItemStyle.HorizontalAlign = HorizontalAlign.Right;

                       

            Grid.Columns.Add(date);

            Grid.Columns.Add(activity);

            Grid.Columns.Add(paid);

           

        }

        private static BoundField CreateBoundField(string dataField, string header, string dataFormatString)

        {

            BoundField field = new BoundField();

            field.DataField = dataField;

            field.HeaderText = header;

            if (!dataFormatString.Equals(""))

            {

                field.DataFormatString = dataFormatString;

            }

            field.SortExpression = dataField;

            field.HtmlEncode = false;

            return field;

        }

Addition:

You can add image column also if you want by using the Grid_RowDataBound event.

protected void GridViewRowDataBound(object sender, GridViewRowEventArgs e)

        {

            if (e.Row.RowType == DataControlRowType.DataRow)

            {

                ImageButton Button = new ImageButton();

                Button.ID = "actionNoteButton";

                    Button.ImageUrl = ResolveUrl("imagepath.jpg");

                    e.Row.Cells[column index].Controls.Add(Button);

            }

        }

cheers!