Question

我有一个表设置，每个数据条目都有一个唯一的Match_ID。但是，当我想调用从Team表中收集团队名称的自定义选择查询时，我会得到重复的行，列出两个相同的Match_ID。我想在GridView中使用列Home team，Away team，Home team score，Away team score和Game date唯一地显示行。我不想在他们的列中显示团队ID，而是他们的团队名称。但是我也想确保我可以更新这个GridView，因为使用AS阻止了我以前能够这样做。

这是我到目前为止使用的图片，显示了查询返回的内容。我正在使用SQL数据源。

 SELECT        MatchStatistics.Match_ID, MatchStatistics.Home_team_ID, MatchStatistics.Away_team_ID, MatchStatistics.Home_team_score, MatchStatistics.Away_team_score, MatchStatistics.Game_date, 
                         Team.Team_name
FROM            MatchStatistics INNER JOIN
                         Team ON MatchStatistics.Home_team_ID = Team.Team_ID OR MatchStatistics.Away_team_ID = Team.Team_ID
WHERE        EXISTS
                             (SELECT DISTINCT Match_ID
                               FROM            MatchStatistics AS MatchStatistics_1)

<asp:GridView ID="EnterMatchGridView" runat="server" AutoGenerateColumns="False" DataKeyNames="Match_ID" DataSourceID="SqlDataSource4" OnRowUpdating="EnterMatchGridView_RowUpdating" OnRowDeleting="EnterMatchGridView_RowDeleting">
        <Columns>
            <asp:BoundField DataField="Match_ID" HeaderText="Match_ID" SortExpression="Match_ID" InsertVisible="False" ReadOnly="True" />
            <asp:TemplateField HeaderText="Home Team" SortExpression="Home_Team_Name">
                <EditItemTemplate>
                    <asp:TextBox ID="TextBox3" runat="server" Text='<%# Bind("Home_Team_Name") %>'></asp:TextBox>

                </EditItemTemplate>
                <ItemTemplate>
                    <asp:Label ID="Label2" runat="server" Text='<%# Bind("Home_Team_Name") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="Away Team" SortExpression="Away_Team_Name">
                <EditItemTemplate>
                    <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("Away_Team_Name") %>'></asp:TextBox>
                </EditItemTemplate>
                <ItemTemplate>
                    <asp:Label ID="Label1" runat="server" Text='<%# Bind("Away_Team_Name") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="Home Team Score" SortExpression="Home_team_score">
                <EditItemTemplate>
                    <asp:TextBox ID="TextBox4" runat="server" Text='<%# Bind("Home_team_score") %>'></asp:TextBox>
                </EditItemTemplate>
                <ItemTemplate>
                    <asp:Label ID="Label4" runat="server" Text='<%# Bind("Home_team_score") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="Away Team Score" SortExpression="Away_team_score">
                <EditItemTemplate>
                    <asp:TextBox ID="TextBox5" runat="server" Text='<%# Bind("Away_team_score") %>'></asp:TextBox>
                </EditItemTemplate>
                <ItemTemplate>
                    <asp:Label ID="Label5" runat="server" Text='<%# Bind("Away_team_score") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="Date" SortExpression="Game_date">
                <EditItemTemplate>
                    <asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("Game_date", "{0:dd-MM-yyyy}") %>'></asp:TextBox>
                </EditItemTemplate>
                <ItemTemplate>
                    <asp:Label ID="Label3" runat="server" Text='<%# Bind("Game_date", "{0:dd-MM-yyyy}") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="Edit/Delete">
                <ItemTemplate>
                    <asp:LinkButton ID="BtnEdit" runat="server" CausesValidation="false" CommandName="Edit" Text="Edit" />
                    <span onclick="return confirm ('Are you Sure?')">
                        <asp:LinkButton ID="BtnDelete" runat="server" CausesValidation="False" CommandName="Delete" Text="Delete" />
                    </span>
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:Button ID="BtnUpdate" runat="server" CausesValidation="true" CommandName="Update" ConflictDetection="OverwriteChanges" Text="Update" ValidationGroup="EnterMatchGridView" />
                    <asp:Button ID="BtnCancel" runat="server" CausesValidation="false" CommandName="Cancel" ConflictDetection="OverwriteChanges" Text="Cancel" />
                </EditItemTemplate>
            </asp:TemplateField>
        </Columns>
    </asp:GridView>

简而言之，如何让此查询为每一行返回唯一的唯一MATCH_ID？

Answer 1

不会那样......

private void timer2_Tick(object sender, EventArgs e)
    {

        while (block.Left > (ClientSize.Width-ClientSize.Width))
        {
            Thread.Sleep(50); //how about putting sleep here for 50ms?
            block.Left -= 1;
            if (block.Left == (ClientSize.Width - ClientSize.Width))
            {
                break;
            }

        }
        while (block.Right < ClientSize.Width)
        {
            Thread.Sleep(50); //how about putting sleep here for 50ms?
            block.Left += 1;
            if (block.Right == ClientSize.Width)
            {
                break;
            }  
        }   
    }

???

从自定义SQL选择查询中删除重复的行

1 个答案: