update value to excel

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C#

MS-Excel

Hi,
I want to update a row in my excel. By entering values in text field and passing those values to grid and passing the dataset to excel..
now I have two links edit and update in grid..After editing on clicking the update button, the value in the grid gets updated. but not in excel..
I just tried the below code,

protected void lnkEdit_Click(object sender, EventArgs e)
        {
            
            LinkButton Edit1 = (LinkButton)sender;
            GridViewRow row = (GridViewRow)Edit1.NamingContainer;

            txtCodeID.Text = ((Label)row.FindControl("CodeID")).Text;
            txtContent.Text = ((Label)row.FindControl("Content")).Text;
            txtMappingCode.Text = ((Label)row.FindControl("MappingCode")).Text;
            btnSave.Visible = true;
            
        }
        protected void lnkUpdate_Click(object sender, EventArgs e)
        {
            LinkButton Save = (LinkButton)sender;
            GridViewRow row = (GridViewRow)Save.NamingContainer;

            ((Label)row.FindControl("CodeID")).Text = txtCodeID.Text;
            ((Label)row.FindControl("Content")).Text = txtContent.Text;
            ((Label)row.FindControl("MappingCode")).Text = txtMappingCode.Text;
            btnSave.Visible = true;
       }

Can u pls guide me on how to update values in excel.





Thanks..!
.