How to get dynamically created gridview rowcount ..?

private void BindGrid()
{
try
{
dsEmp = emp.GetEmployee(customerId, ddlEmpType.SelectedValue);
dsAdd = new DataSet();
dsAdd = salGen.GetAdditionComponent(customerId);
if (dsAdd != null && dsAdd.Tables[0].Rows.Count > 0)
{
dtAddNew = new DataTable();
dtAdd = new DataTable();
foreach (DataRow dr in dsAdd.Tables[0].Rows)
{
DataColumn dc = new DataColumn();
dc.ColumnName = dr["SalComponentName"].ToString();
dtAddNew.Columns.Add(dc);
addColCount++;
}
dtAdd = dtAddNew;
}
dsDed = new DataSet();

dsDed = salGen.GetDeductionComponent(customerId);
if (dsDed != null && dsDed.Tables[0].Rows.Count > 0)
{
dtDedNew = new DataTable();
dtDed = new DataTable();
foreach (DataRow dr in dsDed.Tables[0].Rows)
{
DataColumn dc = new DataColumn();
dc.ColumnName = dr["SalComponentName"].ToString();
dtDedNew.Columns.Add(dc);
dedColCount++;
}
DataColumn dcLast = new DataColumn();
dcLast.ColumnName = "Total";
dtDedNew.Columns.Add(dcLast);
dedColCount++;
hfLastColCount.Value = dedColCount.ToString();
dtDed = dtDedNew;
}
dt = new DataTable();
dt = dsEmp.Tables[0];
dt.Merge(dtAddNew);
dt.Merge(dtDedNew);
//Iterate through the columns of the datatable to set the data bound field dynamically.
int i = 0;

foreach (DataColumn col in dt.Columns)
{

//Declare the bound field and allocate memory for the bound field.
TemplateField bfield = new TemplateField();


//Initalize the DataField value.
bfield.HeaderTemplate = new GridViewTemplate(ListItemType.Header, col.ColumnName);
if (i < 2)
{
//Initialize the HeaderText field value.
bfield.ItemTemplate = new GridViewTemplate(ListItemType.Item, col.ColumnName,"l"+i);
//Initialize the HeaderText field value.
}
else
{
bfield.ItemTemplate = new GridViewTemplate(ListItemType.EditItem, col.ColumnName, "t" + i);
}
//Add the newly created bound field to the GridView.
GrdDynamic.Columns.Add(bfield);
i++;
}

//Initialize the DataSource
GrdDynamic.DataSource = dt;

//Bind the datatable with the GridView.
GrdDynamic.DataBind();
addColCount = 0;
dedColCount = 0;

}
catch (Exception)
{

throw;
}
}

protected void btnSubmit_Click(object sender, EventArgs e)
{
try
{
btn = (Button)sender;
btnnm = btn.Text;
if (btnnm == "Submit")
{
if (ddlEmpType.SelectedValue != null && txtDate.Text != "")
{
BindGrid();

}
ActiveControls(btnnm);
}
else
{
int i = 0;
int k = 2;
int c = GrdDynamic.Rows.Count;

foreach (GridViewRow gvrow in GrdDynamic.Rows)
{



int counter = 1;



int NoOfColumns = GrdDynamic.Rows[0].Cells.Count;
lblEmpName = (Label)gvrow.FindControl("t"+k);
lblEmpId = (Label)gvrow.Cells[1].FindControl("l1");
string nm= GrdDynamic.Rows[0].Cells[0].Text;
// txtTotal = (TextBox)GrdDynamic.Rows[0].Cells[0].Controls[0];
for (int j = 2; j <= NoOfColumns - 2; j++)
{
string colName = GrdDynamic.HeaderRow.Cells[j].Text;
getSalCompIDType(colName);
txtSal = (TextBox)gvrow.Cells[j].FindControl("t"+j);
//salGen = new Salary_Generation();
salGen.customer_Id = customerId;
salGen.date = Convert.ToDateTime(txtDate.Text);
salGen.Emp_id =Convert.ToInt64( lblEmpId.Text);
salGen.Sal_cat_type = type;
salGen.sal_toatal = Convert.ToDecimal(txtTotal.Text);
salGen.Salary = Convert.ToDecimal(txtSal.Text);
salGen.user_Id = userId;
salGen.Salary_Comp_Id = id;

string res = salGen.InsertSalaryGeneration(salGen);


}
k++;
}
}
}
catch (Exception)
{

throw;
}
}