Search File help database

If I understand this correctly, you want to browse for files on the client PC and check if the file exists in the database on the server.

Not tried, but I you can use the file upload control to browse for the file. When you submit, you don't have to save the selected file on the server, but instead can get the filename and check if it exists in the database.

Assume you have an upload control called Upl; in code behind, you can get the filename using Upl.FileName.

...
string query = "select * from yourtable where yourfield=@pFilename";
SqlCommand cmd = new SqlCommand(query, conn)
cmd.Parameters.AddWithValue("@pFilename", Upl.Filename);
...
...