Question

我的应用程序正在使用MVVM Light工具包。这是命令，它绑定在XAML中的按钮：

class TCService : ITCService
{
    public Task<bool> GenerateConfiguration(int cellCount, string templateFilePath, string outputFilePath, IProgress<string> progress)
    {
        return Task.Run(() => RunConfigurator(progress));
    }

    public bool InProgress { get; private set; }

    private bool RunConfigurator(IProgress<string> progress)
    {
        InProgress = true;
        Thread.Sleep(6000);
        progress.Report("Yeah!");
        InProgress = false;
        return true;
    }
}

这是服务：

Set

我想要实现的是当服务开始工作并在最后启用它时要禁用的按钮。当前的实施不会发生这种情况。更重要的是，要遵守MVVM Light。我觉得我的服务应该继承自MVVM Light中的一个基本条目，我需要使用print df.groupby('Column 1')['Column 3'].first().reset_index() Column 1 Column 3 0 1 100 1 2 50 2 3 10 print pd.merge(df, df.groupby('Column 1')['Column 3'].first().reset_index(), on=['Column 1','Column 3']) Column 1 Column 2 Column 3 0 1 a 100 1 1 r 100 2 2 a 50 3 2 q 50 4 3 a 10来通知UI有关更改。但不确定我是否朝着正确的方向前进。

Answer 1

您可以将ButtonCommandNew属性移动到视图模型（包含InProgress属性的类）并绑定到UI。

然后，在CanExecute属性的设置者中，您可以调用last_valid_index，该用户将通知用户_buttonCommandNew RelayCommand上的InProgress因此，根据InProgress属性的值启用或禁用UI中的按钮。

在这种情况下，您需要在致电true之前将worker.GenerateConfiguration属性设置为false，然后在调用完之后将其重置为<FIXML><Batch> <PosRpt RptID="34868232064" ReqID="C905EOD20160427" SetSesID="EOD" MtchStat="0" PriSetPx="326.6" SetPx="328.3" SetPxTyp="1" SettlCcy="USD" ReqTyp="1" MsgEvtSrc="REG" BizDt="2016-04-27" SettlDt="2016-07-14" SettlCurrFxRt="1"><Pty ID="CME" R="21"></Pty><Pty ID="905" R="4"></Pty><Pty ID="CBT" R="22"></Pty><Pty ID="905" R="38"></Pty><Pty ID="905" R="1"></Pty><Instrmt ID="06" Desc="SOYBEAN MEAL FUTURES" CFI="FCAPSO" SecTyp="FUT" Src="H" MMY="201607" MatDt="2016-07-14" Mult="100" Exch="CBT" UOM="tn" UOMQty="100" PxUOM="TON" PxUOMQty="1" ValMeth="FUT" Fctr="1" PxQteCcy="USD" FnlSettlCcy="USD"></Instrmt><Qty Long="2038" Short="1354" Typ="ETR"/><Qty Long="1289" Short="1436" Typ="ALC"/><Qty Long="0" Short="10" Typ="TRF"/><Qty Long="4122" Short="8098" Typ="SOD"/><Qty Long="3957" Short="7406" Typ="FIN"/><Qty Long="937" Short="6325" Typ="IES"/><Qty Long="35" Short="55" Typ="IAS"/><Amt Typ="SMTM" Amt="-675920" Ccy="USD"/><Amt Typ="TVAR" Amt="-325070.33" Ccy="USD"/><Amt Typ="FMTM" Amt="-1000990.33" Ccy="USD"/></PosRpt> <TrdCaptRpt RptID="21195360680" TrdTyp="0" TrdSubTyp="5" ExecID="85271320160426220810TN0002521" TrdDt="2016-04-27" BizDt="2016-04-27" MLegRptTyp="1" MtchStat="0" MsgEvtSrc="REG" TrdID="106695" LastQty="1" LastPx="323.5" TxnTm="2016-04-27T01:10:25-05:00" SettlCcy="USD" SettlDt="2016-07-14" PxSubTyp="1" VenueTyp="E" VenuTyp="E" OfstInst="0"><Instrmt ID="06" Desc="SOYBEAN MEAL FUTURES" CFI="FCAPSO" SecTyp="FUT" MMY="201607" MatDt="2016-07-14" Mult="100" Exch="CBT" UOM="tn" UOMQty="100" PxUOM="TON" PxUOMQty="1" ValMeth="FUT" Fctr="1" PxQteCcy="USD"></Instrmt><Amt Typ="TVAR" Amt="480" Ccy="USD"/><RptSide Side="1" ClOrdID="25245816" CustCpcty="4" OrdTyp="M" SesID="EOD" SesSub="E" AllocInd="1" AgrsrInd="Y"><Pty ID="CME" R="21"></Pty><Pty ID="905" R="4"></Pty><Pty ID="CBT" R="22"></Pty><Pty ID="905" R="1"></Pty><Pty ID="434GU400" R="24"></Pty><Pty ID="4QOL" R="12"></Pty><Pty ID="685" 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R="1"></Pty><Pty ID="434GU400" R="24"></Pty><Pty ID="4QOL" R="12"></Pty><Pty ID="685" R="17"></Pty><Pty ID="4QOL" R="37"></Pty><Pty ID="905" R="38"></Pty><Pty ID="905" R="7"></Pty><RegTrdID ID="FECC1544943BFEC0302D64A564" Src="1010000023" Typ="0" Evnt="2"/></RptSide></TrdCaptRpt> <PosRpt RptID="34868266266" ReqID="C905EOD20160427" SetSesID="EOD" MtchStat="0" PriSetPx="136" SetPx="136" SetPxTyp="1" SettlCcy="USD" ReqTyp="1" MsgEvtSrc="REG" BizDt="2016-04-27" SettlDt="2016-12-28" SettlCurrFxRt="1"><Pty ID="CME" R="21"></Pty><Pty ID="905" R="4"></Pty><Pty ID="CBT" R="22"></Pty><Pty ID="99106105" R="38"></Pty><Pty ID="905" R="1"></Pty><Instrmt ID="UFU" Desc="UAN FOB NOLA SWAP" CFI="FCACSO" SecTyp="FUT" Src="H" MMY="201612" MatDt="2016-12-28" Mult="100" Exch="CBT" UOM="tn" UOMQty="100" PxUOM="TON" PxUOMQty="1" ValMeth="FUT" Fctr="1" PxQteCcy="USD" FnlSettlCcy="USD"></Instrmt><Qty Long="30" Short="0" Typ="SOD"/><Qty Long="30" Short="0" Typ="FIN"/><Qty Long="30" Short="0" Typ="IES"/><Amt Typ="SMTM" Amt="0" Ccy="USD"/><Amt Typ="TVAR" Amt="0" Ccy="USD"/><Amt Typ="FMTM" Amt="0" Ccy="USD"/><RegTrdID ID="PSC152CEF79387P0203D81FA" Src="1010000023" Typ="0" Evnt="2"/></PosRpt> <PosRpt RptID="34868372999" ReqID="C905EOD20160427" SetSesID="EOD" MtchStat="0" PriSetPx="675.25" SetPx="669.25" SetPxTyp="1" SettlCcy="USD" ReqTyp="1" MsgEvtSrc="REG" BizDt="2016-04-27" SettlDt="2016-06-30" SettlCurrFxRt="1"><Pty ID="CME" R="21"></Pty><Pty ID="905" R="4"></Pty><Pty ID="CME" R="22"></Pty><Pty ID="98812736" R="38"></Pty><Pty ID="905" R="1"></Pty><Instrmt ID="CPC" Desc="MALAYSIAN CRUDE PALM OIL CAL S" CFI="FCACSO" SecTyp="FUT" Src="H" MMY="201606" MatDt="2016-06-30" Mult="25" Exch="CME" UOMQty="25" PxUOM="MTONS" PxUOMQty="1" ValMeth="FUT" Fctr="1" PxQteCcy="USD" FnlSettlCcy="USD"></Instrmt><Qty Long="0" Short="200" Typ="SOD"/><Qty Long="0" Short="200" Typ="FIN"/><Qty Long="0" Short="200" Typ="IES"/><Amt Typ="SMTM" Amt="30000" Ccy="USD"/><Amt Typ="TVAR" Amt="0" Ccy="USD"/><Amt Typ="FMTM" Amt="30000" Ccy="USD"/><RegTrdID ID="PSC154373D5298P0302DFC70" Src="1010000023" Typ="0" Evnt="2"/></PosRpt> <PosRpt RptID="34868373000" ReqID="C905EOD20160427" SetSesID="EOD" MtchStat="0" PriSetPx="665.75" SetPx="661.5" SetPxTyp="1" SettlCcy="USD" ReqTyp="1" MsgEvtSrc="REG" BizDt="2016-04-27" SettlDt="2016-11-30" SettlCurrFxRt="1"><Pty ID="CME" R="21"></Pty><Pty ID="905" R="4"></Pty><Pty ID="CME" R="22"></Pty><Pty ID="98812736" R="38"></Pty><Pty ID="905" R="1"></Pty><Instrmt ID="CPC" Desc="MALAYSIAN CRUDE PALM OIL CAL S" CFI="FCACSO" SecTyp="FUT" Src="H" MMY="201611" MatDt="2016-11-30" Mult="25" Exch="CME" UOMQty="25" PxUOM="MTONS" PxUOMQty="1" ValMeth="FUT" Fctr="1" PxQteCcy="USD" FnlSettlCcy="USD"></Instrmt><Qty Long="0" Short="400" Typ="SOD"/><Qty Long="0" Short="400" Typ="FIN"/><Qty Long="0" Short="400" Typ="IES"/><Amt Typ="SMTM" Amt="42500" Ccy="USD"/><Amt Typ="TVAR" Amt="0" Ccy="USD"/><Amt Typ="FMTM" Amt="42500" Ccy="USD"/><RegTrdID ID="PSC1540E0A7EA6P0302DFB8E" Src="1010000023" Typ="0" Evnt="2"/></PosRpt> <TrdCaptRpt RptID="21202575211" TrdTyp="0" TrdDt="2016-04-27" BizDt="2016-04-27" MLegRptTyp="2" MtchStat="1" MsgEvtSrc="REG" TrdID="000991" LastQty="100" LastPx="0.31" TxnTm="2016-04-27T12:33:54-05:00" SettlCcy="USD" SettlDt="2016-08-03" OrigTrdID="15457C3D779LEB0202D1BC6" PxSubTyp="1" VenueTyp="P" VenuTyp="P"><Instrmt ID="DA" Desc="CLASS III MILK OPTIONS" CFI="OCAXPS" SecTyp="OOF" MMY="201607" MatDt="2016-08-03" StrkPx="13.75" Mult="2000" Exch="CME" UOM="lbs" UOMQty="200000" PxUOM="LBS" PxUOMQty="100" PutCall="1" ValMeth="EQTY" Fctr="1" PxQteCcy="USD"></Instrmt><Undly CFI="FCACSO" Desc="CLASS III MILK FUTURES" ID="DA" Src="H" MMY="201607" SecTyp="FUT" Exch="CME"></Undly><Amt Typ="PREM" Amt="62000" Ccy="USD"/><RptSide Side="2" ClOrdID="660" CustCpcty="4" OrdTyp="L" SesID="EOD" SesSub="P" TmBkt="V" AllocInd="1" AgrsrInd="Y"><Pty ID="CME" R="21"></Pty><Pty ID="905" R="4"></Pty><Pty ID="CME" R="22"></Pty><Pty ID="905" R="1"></Pty><Pty ID="77040322" R="24"></Pty><Pty ID="BKF" R="12"></Pty><Pty ID="826" R="17"></Pty><Pty ID="BLT" R="37"></Pty><Pty ID="905" R="38"></Pty><Pty ID="905" R="7"></Pty><RegTrdID ID="FECC15457C3D779LEB0202D1BC8" Src="1010000023" Typ="0" Evnt="2"/></RptSide></TrdCaptRpt> <TrdCaptRpt RptID="21206412158" TrdTyp="0" TrdSubTyp="5" TrdDt="2016-04-27" BizDt="2016-04-27" MLegRptTyp="1" MtchStat="1" MsgEvtSrc="REG" TrdID="124710" LastQty="5" LastPx="0.13" SettlCcy="USD" SettlDt="2016-08-31" PxSubTyp="1" VenueTyp="P" VenuTyp="P" OfstInst="0"><Instrmt ID="DA" Desc="CLASS III MILK OPTIONS" CFI="OPAXPS" SecTyp="OOF" MMY="201608" MatDt="2016-08-31" StrkPx="13" Mult="2000" Exch="CME" UOM="lbs" UOMQty="200000" PxUOM="LBS" PxUOMQty="100" PutCall="0" ValMeth="EQTY" Fctr="1" PxQteCcy="USD"></Instrmt><Undly CFI="FCACSO" Desc="CLASS III MILK FUTURES" ID="DA" Src="H" MMY="201608" SecTyp="FUT" Exch="CME"></Undly><Amt Typ="PREM" Amt="1300" Ccy="USD" SettlDt="2016-04-27"/><RptSide Side="2" ClOrdID="726" CustCpcty="4" OrdTyp="L" SesID="EOD" SesSub="P" TmBkt="M" AllocInd="1" AgrsrInd="Y"><Pty ID="CME" R="21"></Pty><Pty ID="905" R="4"></Pty><Pty ID="CME" R="22"></Pty><Pty ID="905" R="1"></Pty><Pty ID="7704038A" R="24"></Pty><Pty ID="GRTY" R="12"></Pty><Pty ID="888" R="17"></Pty><Pty ID="GRTY" R="37"></Pty><Pty ID="905" R="38"></Pty><Pty ID="905" R="7"></Pty><RegTrdID ID="FECC1544943BFEC0302D9028AE" Src="1010000023" Typ="0" Evnt="2"/></RptSide></TrdCaptRpt> </Batch></FIXML>方法

使用RelayCommand不会更新按钮状态

1 个答案: