Welcome to WuJiGu Developer Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
2.0k views
in Technique[技术] by (71.8m points)

vb.net - need to get value from sql query

Through ADO,I like to do the following query:

    select name, address, zip from terr where id = '33334'

I like then to assign name, addess, zip to variables so that I can assign it later in my program. How do I do this with VB.NET ADO?

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

Try somethign like this:

  Dim dbName As String
  Dim dbAddress As String
  Dim dbZip As String
  Using connObj As New SqlClient.SqlConnection("<connectionString>")
     Using cmdObj As New SqlClient.SqlCommand("select name, address, zip from terr where id = '33334'", connObj)
        connObj.Open()
        Using readerObj As SqlClient.SqlDataReader = cmdObj.ExecuteReader
           'This will loop through all returned records 
           While readerObj.Read
              dbName = readerObj("name").ToString
              dbAddress = readerObj("address").ToString
              dbZip = readerObj("zip").ToString
              'handle returned value before next loop here
           End While
        End Using
        connObj.Close()
     End Using
  End Using

Also, you should look into parameterizing the value for the where clause.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to WuJiGu Developer Q&A Community for programmer and developer-Open, Learning and Share
...