編譯錯誤 - 您是否缺少using指令或程序集引用？

-2

我調試程序後，該頁面顯示我以下錯誤。我不知道解決這個錯誤，是缺少程序集？編譯錯誤 - 您是否缺少using指令或程序集引用？

以下是錯誤的顯示：

編譯錯誤

Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: CS1061: 'ASP.dcbrequestlogcriteria_aspx' does not contain a definition for 'ddlTelco_SelectedIndexChanged' and no extension method 'ddlTelco_SelectedIndexChanged' accepting a first argument of type 'ASP.dcbrequestlogcriteria_aspx' could be found (are you missing a using directive or an assembly reference?)

源錯誤：

<span class="fieldlable">Telco:</span> 
<span> 
<asp:DropDownList ID="ddlTelco" runat="server" DataTextField="Text" DataValueField="Value" AutoPostBack="true" OnSelectedIndexChanged="ddlTelco_SelectedIndexChanged" SelectMethod="LoadTelco" Enabled="false"></asp:DropDownList> 
</span> 
<asp:RequiredFieldValidator ID="RequiredFieldValidatorTelco" runat="server" ErrorMessage="Telco" ControlToValidate="ddlTelco"></asp:RequiredFieldValidator>

來源

2017-01-17 Cheah Eng Teong

錯誤消息告訴確切的問題是... – VDWWD

這意味着它正在尋找的事件ddlTelco_SelectedIndexChanged您訂閱了你的控制

在您的標記背後的代碼，定義事件爲ddlTelco_SelectedIndexChanged或通過訂閱您的控制，以一個事件併產生

ddlTelco.OnSelectedIndexChanged + = ddlTelco_SelectedIndexChanged

protected void ddlTelco_SelectedIndexChanged(object sender, EventArgs e) 
    { 
    //Write implementation here 
    }

並重建。

來源

2017-01-17 08:03:17

您分配了事件處理ddlTelco_SelectedIndexChanged到OnSelectedIndexChanged事件DropDownList的但是你忘了在後端定義它，或者它可能會被刪除。

如果你真的想要做的事與OnSelectedIndexChanged定義在後端ddlTelco_SelectedIndexChanged和重建解決方案。如果你不想辦法從標記刪除OnSelectedIndexChanged

來源

2017-01-17 07:50:12

編譯錯誤 - 您是否缺少using指令或程序集引用？

回答

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