Empty path is not legal exception while updating images in

Hi Everyone,

I am developing 1 desktop application to my friend office,in that application i can store multiple images and i can retrieve the information for the same..My issue here is after retrieving the information when i click on update button I'm getting runtime exception i.e (Empty path is not legal exception)..

Here is the code which I wrote under updatebutton method:

public partial class CustomerDetails : Form 

{

 string imageloc = "";

 string imageloc1 = "";

 string imageloc2 = "";

 string imageloc3 = "";

 string imageloc4= " "; 

public static Byte[] Imagesave(string imagelocation) 

{ 

byte[] img = null;

  /*Empty path is not legal error*/ FileStream fs = new FileStream(imagelocation, FileMode.Open, FileAccess.Read); BinaryReader br = new BinaryReader(fs);       

      img = br.ReadBytes((int)fs.Length);        

     fs.Close();      

       br.Close(); 

return img;

 }

 private void btnupdateinfo_Click(object sender, EventArgs e) 

{

 string scn = ConfigurationManager.ConnectionStrings["Myconn"].ConnectionString; using (SqlConnection cn = new SqlConnection(scn)) ;

{ 

using (SqlCommand cmd = new SqlCommand("SP_UpdateInfo", cn)) 

{ 

try

 {                          

 cmd.CommandType = CommandType.StoredProcedure;                    

      cmd.Parameters.AddWithValue("@Hp_Number", tbhpnum.Text);                

         cmd.Parameters.AddWithValue("@Customer_Name", tbcusnam.Text);              

           cmd.Parameters.AddWithValue("@Customer_Contact_Number", tbcusmblno.Text);                   

      cmd.Parameters.AddWithValue("@Guarantor_Name", tbguanam.Text);                

         cmd.Parameters.AddWithValue("@Guarantor_Contact_Number", tbguamblno.Text);           

              cmd.Parameters.AddWithValue("@Hp_Date", DateTime.Parse(tbhpdat.Text));               

          cmd.Parameters.AddWithValue("@Customer_Address", tbcusadd.Text);                      

   cmd.Parameters.AddWithValue("@Vehicle", tbveh.SelectedItem.ToString());                  

       cmd.Parameters.AddWithValue("@Vehicle_Model", tbvehmod.SelectedItem.ToString());            

             cmd.Parameters.AddWithValue("@Vehicle_Number", tbvehnum.Text);                     

    cmd.Parameters.AddWithValue("@Chasis_Number", tbchanum.Text);                      

   cmd.Parameters.AddWithValue("@Engine_Number", tbengnum.Text);            

             cmd.Parameters.AddWithValue("@FC_Date", DateTime.Parse(tbfcdat.Text));         

                cmd.Parameters.AddWithValue("@Insurance_Date", DateTime.Parse(tbinsdat.Text));             

            cmd.Parameters.AddWithValue("@Insurance_Amount", Convert.ToInt32(tbinsamt.Text));            

             cmd.Parameters.AddWithValue("@Paid_Amount", Convert.ToInt32(tbpaiamt.Text));                

         cmd.Parameters.AddWithValue("@Paid_Date", DateTime.Parse(tbpaidat.Text));                     

    cmd.Parameters.AddWithValue("@Vehicle_Pic",Imagesave(imageloc));                    

     cmd.Parameters.AddWithValue("@Customer_Pic", Imagesave(imageloc1));                    

     cmd.Parameters.AddWithValue("@Guarantor_Pic", Imagesave(imageloc2));                 

        cmd.Parameters.AddWithValue("@Documents_Pic", Imagesave(imageloc3));          .

               cmd.Parameters.AddWithValue("@Insurance_Pic", Imagesave(imageloc4)); 

if (cn.State != ConnectionState.Open)                     

        cn.Open(); 

int count = cmd.ExecuteNonQuery(); 

if (count == 1) 

{ 

MessageBox.Show(count.ToString() + "Customer(s) Record(s) has Updated                     Successfully .", "Succes", MessageBoxButtons.OK);

 }

 }

 catch (SqlException ex) 

{

 MessageBox.Show(ex.ToString()); 

}

 finally { if (cn.State == ConnectionState.Open)                           

  cn.Close(); 

} } } }