Visual basic/sql - 無法投射類型

Question

在嘗試從表格中選擇某些記錄時，將此錯誤消息納入。

我的頭腦是現在拍攝.. 任何想法？謝謝！

myreader是，

Public myReader As SqlCeDataReader 
Dim currentMatch(1) As String 

cmd.CommandText = "SELECT schoolid,opponent " & _ 
        "FROM TEAM_SCHEDULE WHERE seasonid = " & i & _ 
        " AND gameid = " & 1 & " ORDER BY id" 
myReader = cmd.ExecuteReader() 
Do While myReader.Read() 
    currentMatch(0) = myReader.GetString(0) 
    currentMatch(1) = myReader.GetString(1) 
Loop 

Answer 1

猜測：

schoolid被定義爲INT，但出於某種原因，你正在使用的不是GetStringGetInt32去取。

Do While myReader.Read() 
    currentMatch(0) = myReader.GetInt32(0).ToString() 
    currentMatch(1) = myReader.GetString(1) 
Loop 

Answer 2

爲什麼不使用數據表？

Public myReader As SqlCeDataReader 
Dim currentMatch(1) As String 

cmd.CommandText = "SELECT schoolid,opponent " & _ 
       "FROM TEAM_SCHEDULE WHERE seasonid = " & i & _ 
       " AND gameid = " & 1 & " ORDER BY id" 
Dim dt as new DataTable 

dt.load(cmd.ExecuteReader()) 

如果你願意，你可以查詢結果DataTable中使用LINQ

dim QueryResults = from p as datarow in dt.rows where p.seasonid<10 select p 

或選擇列表

dim MyObjList = (from p as datarow in dt.rows select seasonid = p.seasonid, gameid = p.gameid).ToList