How to pass data from childform to parentform ?

I have two forms ,Form1 and Form2.

Form1 - Parent

Form2 - Child

Form1 Contains the following,

Textbox - it loads the file path,

Datagridview - it loads the file with its data,

ButtonNext -when button cliked it opens Form2,

Form2 Contains the following,

BrowseButton - it broswe for the file from the directory

Textbox - it then shows the path

ButtonFinish - it will tabes you back to Form1

*Now i want to access datagridview from Form1(Parent) from Form2(child). Now i can broswe the file on Form2 and when i click finish i can see my file path on Form1(parent) from the textbox but with no databeing loaded.

How can i load the data on Form1 into the datagridview ?

this is my code so far..

Form2.

public frmInputFile(frmMain_Page _frmMain)

{

InitializeComponent();

this._frmMain = _frmMain;

}

private void btnBrowse_Click(object sender, EventArgs e)

{

BrowseFile();

}

private void btnFinish_Click(object sender,EventArgs e)

{

_frmMain.SetFilepath(txtInputfile.Text);

_grid.Rows.Clear(); //cant get the grid from form1

string PathSelection = "";

if (txtInputfile.Text.Length > 0)

{

PathSelection = txtInputfile.Text;

}

oDataSet = new DataSet();

XmlReadMode omode = oDataSet.ReadXml(PathSelection);

for (int i = 0; i < oDataSet.Tables[2].Rows.Count; i++)

{

string comment = oDataSet.Tables["data"].Rows[i][2].ToString();

string font = Between(comment, "[Font]", "[/Font]");

string datestamp = Between(comment, "[DateStamp]", "[/DateStamp]");

string commentVal = Between(comment, "[Comment]", "[/Comment]");

string[] row = new string[] { oDataSet.Tables["data"].Rows[i][0].ToString(), oDataSet.Tables["data"].Rows[i][1].ToString(), font, datestamp, commentVal };

_grid.Rows.Add(row);

}

this.Hide();

Program._MainPage.Show();

Form1

private void btnLoadfile_Click(object sender, EventArgs e)

{

frmInputFile frmInput = new frmInputFile(this);

frmInput.Show();

}

public void SetFilepath(string Filepath)

{

txtInputfile.Text = Filepath;

}

//I dont know how i can handle the gridview here

public void Loadgrid(string LoadGrid)

{

Gridview_Input.ToString();

}