右击也不显示查看设计器 

工程文件 .csproj中将

<Compile Include="OperatorWindows\Connection.cs" />
    <Compile Include="OperatorWindows\Connection.Designer.cs">
      <DependentUpon>Connection.cs</DependentUpon>
</Compile>

修改为

    <Compile Include="OperatorWindows\Connection.cs" >
      <SubType>Form</SubType>
    </Compile>
    <Compile Include="OperatorWindows\Connection.Designer.cs">
      <DependentUpon>Connection.cs</DependentUpon>
    </Compile>

winForm combobox动态加载数据后不能设置选中项

            if (keyWordsText != "")
            {
                combRegionSource.SelectedIndexChanged -= combRegionSource_SelectedIndexChanged;
                combRegionSource.SelectedItem = keyWordsText;
            }
            combRegionSource.SelectedIndexChanged += combRegionSource_SelectedIndexChanged;

winform界面看不到控件，大纲也不显示。但是在属性上可以看到。

解决办法是删除对应.Designer.cs中的对应代码。