Adding new row to Gridview in 4.0

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Hi,

Its feeling good to be on Codeproject after a long time.

My issue is about adding a row to gridview dinamically.

In past I have done like Gridview.rows.add(bla bla).

Now I have moved to VS 2010 & Framework 4.0.

Its strange that I am not able to find method Add() for adding new row.

The intellisence doesn't giving me Add() after "Gridview.Rows.".

Make sure I dont wont to bind gridview with any datasource.

Just want to add row to gridview.

Thanks,
Hemant Thakar

Posted 29-Dec-11 18:26pm

Hemant Thaker

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Supriya Srivastav · Answer 1 · 2011-12-29T18:38:00

Solution 1

Ya,you are right.A row can't be added to gridview directly but if you want to add a row in gridview,you can add it in datasource i.e. datatable and then give it as a datasource to gridview.

Posted 29-Dec-11 18:38pm

Supriya Srivastav

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Hemant Thaker 30-Dec-11 0:44am

True.,
But what if i dont want to bind it with datasource.
That means after binding my gridview will be refreshed and data which was there previously will be lost.
Let me be clear.
I have only one column in gridview and that is template column.
I have put File Uploader control on that.
I want user to add rows dinamically, so that he has option to upload as many documents as he wants.

Supriya Srivastav 30-Dec-11 0:49am

k,for that you can maintain session and put your datatable in that session variable.

Sarvesh Kumar Gupta · Answer 2 · 2011-12-29T20:22:00

Please use below code for adding a new row to grid

C#

DataTable _dtBands = ((DataTable)ViewState["Data"]).Clone();

        DataRow row;
        if (_type == "ADD")
        {
            row = _dtBands.NewRow();
            row["Item_ID"] = "";
            row["Item_Name"] = "";
            row["UOM"] = "";
            row["UOM_id"] = "";
            row["Quantity"] = "0";
            row["Tolrence"] = "0";
            row["markup"] = "0";
            row["markup_Fixed"] = "0";

            _dtBands.Rows.Add(row);
            for (int i = 0; i < grdMain.Rows.Count; i++)
            {
                row = _dtBands.NewRow();
                row["Item_ID"] = ((DropDownList)grdMain.Rows[i].FindControl("ddlItemName")).SelectedValue.ToString();
                row["Item_Name"] = ((DropDownList)grdMain.Rows[i].FindControl("ddlItemName")).SelectedItem.Text;
                row["UOM"] = ((Label)grdMain.Rows[i].FindControl("lblUOM")).Text;
                row["UOM_id"] = ((HiddenField)grdMain.Rows[i].FindControl("hdnuomid")).Value;
                row["Quantity"] = ((TextBox)grdMain.Rows[i].FindControl("txtqty")).Text;
                row["Tolrence"] = ((TextBox)grdMain.Rows[i].FindControl("txttolrence")).Text;
                row["markup"] = ((TextBox)grdMain.Rows[i].FindControl("txtmarkup")).Text;
                row["markup_Fixed"] = ((TextBox)grdMain.Rows[i].FindControl("txtmarkupFixed")).Text;
                _dtBands.Rows.Add(row);
            }            
        }


grdMain.DataSource = _dtBands ;
grdMain.DataBind();

NandaKumer · Answer 3 · 2011-12-30T14:26:00

Solution 3

check these blogs
http://forums.asp.net/t/1147158.aspx[^]
http://www.highoncoding.com/Articles/98_Adding_a_New_Row_in_GridView.aspx[^]
--NDK

Posted 30-Dec-11 14:26pm

NandaKumer

real_king · Answer 4 · 2012-01-02T20:22:00

public partial class Admin_Invoicesl : UserControlDataAccess
{
    DataTable productsDt = new DataTable();
    DataTable GvDT=new DataTable();
    DataRow GVr = null;
    protected void Page_Load(object sender, EventArgs e)
    {
        productsDt = DA.GetProducts(null, null, null, null, "2");
        if (!IsPostBack)
        {
            SetInitialRow();
        }
        
            
            
        

    }


    private void SetInitialRow()
    {
        GvDT.Columns.Add(new DataColumn("RowNumber", typeof(string)));
        GvDT.Columns.Add(new DataColumn("Product", typeof(string)));
        GvDT.Columns.Add(new DataColumn("Qty", typeof(string)));
        GVr = GvDT.NewRow();
        GVr["RowNumber"] = 1;
        GVr["Product"] = string.Empty;
        GVr["Qty"] = string.Empty;
        GvDT.Rows.Add(GVr);
        Session["DT"] = GvDT;
        Session.Timeout = 60;
        Gridview1.DataSource = (DataTable)Session["DT"];
        Gridview1.DataBind();
    }

    private void AddNewRowToGrid()
    {
        setprevData();
        DataTable dt = (DataTable)Session["DT"];
        GVr = dt.NewRow();
        GVr["RowNumber"] = dt.Rows.Count+1;
        GVr["Product"] = string.Empty;
        GVr["Qty"] = string.Empty;
        dt.Rows.Add(GVr);
        Session["DT"] = dt;

    }
    protected void setprevData()
    {
        DataTable prevdata = (DataTable)Session["DT"];
        for (int i = 0; i < Gridview1.Rows.Count; i++)
        {
            prevdata.Rows[i]["Product"] = ((DropDownList)Gridview1.Rows[i].FindControl("DProducts")).SelectedValue.ToString();
            prevdata.Rows[i]["Qty"] = ((TextBox)Gridview1.Rows[i].FindControl("T_Quantity")).Text;



        }

    }


  

    protected void Button1_Click(object sender, EventArgs e)
    {

        AddNewRowToGrid();
        Gridview1.DataSource = (DataTable)Session["DT"];
        Gridview1.DataBind();
    }

Adding new row to Gridview in 4.0

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