c# datagridview 下拉过滤

FloatingPopup_src
.................\CalculatorBox
.................\.............\AssemblyInfo.cs
.................\.............\CalculatorBox.cs
.................\.............\CalculatorBox.csproj
.................\.............\CalculatorBox.csproj.user
.................\.............\CalculatorBox.resx
.................\.............\ComboButton.cs
.................\.............\ComboButton.resx
.................\.............\frmCalculator.cs
.................\.............\frmCalculator.resx
.................\.............\frmFloatingBase.cs
.................\.............\frmFloatingBase.resx
.................\.............\ICalculatorBoxPopup.cs
.................\.............\IFloatingPopup.cs
.................\CalculatorBoxTest
.................\.................\App.ico
.................\.................\AssemblyInfo.cs
.................\.................\CalculatorBoxTest.csproj
.................\.................\CalculatorBoxTest.csproj.user
.................\.................\Form1.cs
.................\.................\Form1.resx
.................\FloatingPopup
.................\.............\App.ico
.................\.............\AssemblyInfo.cs
.................\.............\ComboButton.cs
.................\.............\ComboButton.resx
.................\.............\FloatingBox.cs
.................\.............\FloatingBox.resx
.................\.............\FloatingPopup.csproj
.................\.............\FloatingPopup.csproj.user
.................\.............\frmFloatingBase.cs
.................\.............\frmFloatingBase.resx
.................\.............\IFloatingPopup.cs
.................\FloatingPopup.sln
.................\FloatingPopupTest
.................\.................\App.ico
.................\.................\AssemblyInfo.cs
.................\.................\FloatingPopupTest.csproj
.................\.................\FloatingPopupTest.csproj.user
.................\.................\Form1.cs
.................\.................\Form1.resx
.................\.................\frmFloatingDerived.cs
.................\.................\frmFloatingDerived.resx
.................\Image
.................\ListViewComboBox
.................\................\App.ico
.................\................\AssemblyInfo.cs
.................\................\frmListViewCombo.cs
.................\................\frmListViewCombo.resx
.................\................\ListViewComboBox.cs
.................\................\ListViewComboBox.csproj
.................\................\ListViewComboBox.csproj.user
.................\................\ListViewComboBox.resx

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