Updating through gridview doesn't works

Question

I am trying to update in gridview but it's not getting update 


Below is my coding

protected void GridView_Updating(object sender, GridViewUpdateEventArgs e)

    {

        SqlConnection con = new SqlConnection(@"Data Source=SONY-VAIO\SQLEXPRESS;Initial Catalog=Employee;Integrated Security=True");

        con.Open();

        Label lb = (Label)GridView.Rows[e.RowIndex].FindControl("Id");

        RadioButtonList rd = (RadioButtonList)GridView.Rows[e.RowIndex].FindControl("rdStatus");

        CheckBoxList cb = (CheckBoxList)GridView.Rows[e.RowIndex].FindControl("ChkActive");

        TextBox tx1 = (TextBox)GridView.Rows[e.RowIndex].FindControl("txtId");

        TextBox tx2 = (TextBox)GridView.Rows[e.RowIndex].FindControl("txtName");

        TextBox tx3= (TextBox)GridView.Rows[e.RowIndex].FindControl("txtAddress");

        DropDownList ddl = (DropDownList)GridView.Rows[e.RowIndex].FindControl("ddlDepartment");

        

        

        SqlCommand cmd = new SqlCommand("Update Edittable set Name=@Name , Address=@Address,Status=@Status,Active=@Active,Department=@Department,Salary=@Salary WHERE Id=@Id", con);

        cmd.Parameters.AddWithValue("@Id", txtId.Text.ToString());

        cmd.Parameters.AddWithValue("@Name", txtName.Text.ToString());

        cmd.Parameters.AddWithValue("@Address", txtAddress.Text.ToString());

        cmd.Parameters.AddWithValue("@Department", ddlDepartment.SelectedValue.ToString());

        cmd.Parameters.AddWithValue("@Salary", txtSalary.Text.ToString());

        cmd.Parameters.AddWithValue("@Active", ChkActive.SelectedValue.ToString());

        cmd.Parameters.AddWithValue("@Status", rdStatus.SelectedValue.ToString());

       

        cmd.ExecuteNonQuery();

       

        GridView.EditIndex = -1;

        FillGridView();

    }