Web Forms :: Saving File To Database

I have two buttons ... one is insert btn another one is fileupload btn.

In the fileupload btn i creat a code in blow. I can upload the file successfully.

I need to insert a file in sql by using insert btn. For that I can create a insert query every thing but I cannot access the string filename value in the insert btn. So how I get the string value for insert btn. I mentioned the insert query also.

protected void  UploadButton_Click(object sender, EventArgs e)  {
         string filePath = FileUploadControl.PostedFile.FileName;  
string filename = Path.GetFileName(filePath);       
string ext = Path.GetExtension(filename);       
string contenttype = String.Empty;      

[Code] ....

Insert Btn:

protected void btnInsert_Click(object sender, EventArgs e) { 
cmd = new SqlCommand("insert into emp(FileName,ContanType, Data)values(@FileName, @ContanType, @Data)", con); 
cmd.CommandType = CommandType.Text; 
cmd.Parameters.AddWithValue("@FileName", filename);  
cmd.Parameters.AddWithValue("@ContanType", contenttype);        cmd.Parameters.AddWithValue("@Data",bytes);
con.Open(); cmd.ExecuteNonQuery(); 
con.Close();  Response.Redirect("Default.aspx"); 
} }