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Ado Field in ASP

Ado Field in ASP

In Classic ASP, when working with ADO Recordsets, a field represents a column from your database query result.


? Accessing ADO Fields in ASP

You access fields in a recordset using either:

rs("FieldName")

or

rs.Fields("FieldName").Value

Both return the value of the column for the current row.


? Example: Display Fields from a Recordset

<%Dim conn, rs, sqlSet conn = Server.CreateObject("ADODB.Connection")conn.Open "Provider=SQLOLEDB;Data Source=SERVER;Initial Catalog=DB;User ID=USER;Password=PASSWORD;"sql = "SELECT UserID, Name, Email FROM Users"Set rs = conn.Execute(sql)Do Until rs.EOF    Response.Write "ID: " & rs("UserID") & "<br>"    Response.Write "Name: " & rs("Name") & "<br>"    Response.Write "Email: " & rs("Email") & "<hr>"    rs.MoveNextLooprs.CloseSet rs = Nothingconn.CloseSet conn = Nothing%>

? Field Properties

You can also inspect field metadata:

For Each fld In rs.Fields    Response.Write "Name: " & fld.Name & "<br>"    Response.Write "Type: " & fld.Type & "<br>"    Response.Write "Size: " & fld.DefinedSize & "<br><br>"Next

? Common ADO Field Data Types (by Type value)

Type ValueNameDescription
3adIntegerInteger
200adVarCharVariable-length string
7adDateDate/time
11adBooleanBoolean
131adNumericNumeric

? Best Practices

  • Always check for NULL values:

    If Not IsNull(rs("Email")) Then    Response.Write rs("Email")End If
  • Use Server.HTMLEncode() when displaying user input to avoid XSS:

    Response.Write Server.HTMLEncode(rs("Name"))

Let me know if you'd like help formatting field data (e.g., dates, currency) or looping through dynamic fields.

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