データベースのエントリを表示する ASP.NET ページを開発しようとしています。私のクエリには約16列あります。しかし、コードに 16 列すべてを含むクエリを配置すると、GridView は表示されません。
クエリの列数が 8 列を超えない場合にのみページに表示されます。どうすればいいのかわからない 誰か助けてくれませんか?
これらはクエリのコードサンプルであり、クエリを入力するためのバスクエンドです
<asp:GridView ID="GridView1" runat="server" CellPadding="4" ForeColor="#333333"
GridLines="None" Width="900px">
<AlternatingRowStyle BackColor="White" />
<EditRowStyle BackColor="#2461BF" />
<FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
<RowStyle BackColor="#EFF3FB" />
<SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
<SortedAscendingCellStyle BackColor="#F5F7FB" />
<SortedAscendingHeaderStyle BackColor="#6D95E1" />
<SortedDescendingCellStyle BackColor="#E9EBEF" />
<SortedDescendingHeaderStyle BackColor="#4870BE" />
</asp:GridView>
そして、これが私がそれを設定する方法です:
Try
myconn.Open()
Dim sqlstring As String = "SELECT a.account_id AS 'No', a.accountid_number AS 'ID', CONCAT(account_name,' ',account_midname,' ',account_surname ) AS 'Student Name', a.account_type As 'Type', l.live_mail AS 'Acount Name' AS 'Password' FROM account a, liveaccount l WHERE a.account_id = l.l_account_id"
Dim smd As MySqlCommand
smd = New MySqlCommand(sqlstring, myconn)
smd.CommandType = CommandType.Text
Dim da As New MySqlDataAdapter(smd)
Dim cb As New MySqlCommandBuilder(da)
Dim ds As New DataSet()
da.Fill(ds)
GridView1.DataSource = ds.Tables(0)
GridView1.DataBind()
myconn.Close()
Catch ex As Exception
myconn.Close()
End Try
これは機能するクエリです。列を 1 つでも追加しても、表示されません。
SELECT a.account_id AS 'No', a.accountid_number AS 'ID', CONCAT(account_name,' ',account_midname,' ',account_surname ) AS 'Student Name', a.account_type As 'Type', l.live_mail AS 'Acount Name' FROM account a, liveaccount l WHERE a.account_id = l.l_account_id"
これは動作すると思われますが、挿入すると gridView が表示されません:
SELECT a.account_id AS 'No', a.accountid_number AS 'ID', a.account_type AS 'Type', a.account_name || ' ' || a.account_midname || ' ' || a.account_surname AS 'Student Name', a.account_birthdate AS 'BirthDate', l.gender AS 'Gender', l.position AS 'Position', l.office_department AS 'Office/Department', l.date_created AS 'Date Created', time_created AS 'Time Created', l.office_tel AS 'Tel No', office_localno AS 'Office Tel', l.contact_no 'Cell Phone', l.alternate_email AS 'Other Email', l.classification AS 'Classification', l.registered AS 'Status' FROM account a, liveaccount l WHERE a.account_id = l.l_account_id AND l.registered = 'NOTREGISTERED' AND a.account_deleted = 0 ORDER BY a.account_id Desc;