Winforms里判断DatagridView里面的CheckBox是否选中

E:\学习项目\Windows_GridviewAndCheckbox\Windows_GridviewAndCheckbox\bin\Debug\Windows_GridviewAndCheckbox.exe E:\学习项目\Windows_GridviewAndCheckbox\Windows_GridviewAndCheckbox\bin\Debug\Windows_GridviewAndCheckbox.pdb E:\学习项目\Windows_GridviewAndCheckbox\Windows_GridviewAndCheckbox\obj\Debug\ResolveAssemblyReference.cache E:\学习项目\Windows_GridviewAndCheckbox\Windows_GridviewAndCheckbox\obj\Debug\Windows_GridviewAndCheckbox.Form1.resources E:\学习项目\Windows_GridviewAndCheckbox\Windows_GridviewAndCheckbox\obj\Debug\Windows_GridviewAndCheckbox.Properties.Resources.resources E:\学习项目\Windows_GridviewAndCheckbox\Windows_GridviewAndCheckbox\obj\Debug\Windows_GridviewAndCheckbox.csproj.GenerateResource.Cache E:\学习项目\Windows_GridviewAndCheckbox\Windows_GridviewAndCheckbox\obj\Debug\Windows_GridviewAndCheckbox.exe E:\学习项目\Windows_GridviewAndCheckbox\Windows_GridviewAndCheckbox\obj\Debug\Windows_GridviewAndCheckbox.pdb E:\学习项目\Windows_GridviewAndCheckbox\Windows_GridviewAndCheckbox\obj\Debug\Windows_GridviewAndCheckbox.Form2.resources C:\Documents and Settings\Administrator\桌面\Windows_GridviewAndCheckbox\Windows_GridviewAndCheckbox\obj\Debug\Windows_GridviewAndCheckbox.exe C:\Documents and Settings\Administrator\桌面\Windows_GridviewAndCheckbox\Windows_GridviewAndCheckbox\obj\Debug\Windows_GridviewAndCheckbox.pdb C:\Documents and Settings\Administrator\桌面\Windows_GridviewAndCheckbox\Windows_GridviewAndCheckbox\bin\Debug\Windows_GridviewAndCheckbox.exe C:\Documents and Settings\Administrator\桌面\Windows_GridviewAndCheckbox\Windows_GridviewAndCheckbox\bin\Debug\Windows_GridviewAndCheckbox.pdb C:\Documents and Settings\Administrator\桌面\Windows_GridviewAndCheckbox\Windows_GridviewAndCheckbox\obj\Debug\ResolveAssemblyReference.cache C:\Documents and Settings\Administrator\桌面\Windows_GridviewAndCheckbox\Windows_GridviewAndCheckbox\obj\Debug\Windows_GridviewAndCheckbox.Form1.resources C:\Documents and Settings\Administrator\桌面\Windows_GridviewAndCheckbox\Windows_GridviewAndCheckbox\obj\Debug\Windows_GridviewAndCheckbox.Properties.Resources.resources C:\Documents and Settings\Administrator\桌面\Windows_GridviewAndCheckbox\Windows_GridviewAndCheckbox\obj\Debug\Windows_GridviewAndCheckbox.csproj.GenerateResource.Cache