DataGridView中复选框的空值 [英] Null value for a checkbox in a DataGridView

问题描述

我有一个DataGridView，我已经手动将其编码为表格，并且单元格4,5,7,8,9是复选框字段，我需要3个复选框答案，以便在加载DGV时它为空" ''，然后用户输入true或false.有没有办法做到这一点?好像我放了除"true"或"false"以外的任何其他内容一样，我得到一个错误，我试图放入不确定"，但这仍然引发错误.

Hi,

i have a DataGridView which i have manually coded into the form, and cells 4,5,7,8,9 are checkbox fields, and i need 3 answers for the checkboxes so that when the DGV is loaded it is ''null'' and then the user inputs true or false. is there a way to do this? as if i put anything other than ''true'' or ''false'' i get an error, i have tried to put ''Indeterminate'' but that still throws an error.

TMSScoreSheet.Rows[0].Cells[4].Value = "Indeterminate";
TMSScoreSheet.Rows[0].Cells[5].Value = "False";
TMSScoreSheet.Rows[0].Cells[7].Value = "False";
TMSScoreSheet.Rows[0].Cells[8].Value = "False";
TMSScoreSheet.Rows[0].Cells[9].Value = "False";

Billy

Billy

推荐答案

你好

在C#中使用Nullable类型

Hello

Use Nullable type in C#

bool? b = null;

参见:

http://msdn.microsoft.com/en-us/library/1t3y8s4s (v = vs.80).aspx [ http://wpf.2000things .com/2011/07/29/353-binding-a-three-state-checkbox-to-a-nullable-bool/ [ http://stackoverflow.com/questions/8401974/what-is-best-way-to-bind-to-tri-state-复选框 [ http://social.msdn.microsoft.com/Forums/zh/winforms/thread/c8fb99ad-d9a8-40dd-9a9d-a1f598a9a92e [

See:

http://msdn.microsoft.com/en-us/library/1t3y8s4s(v=vs.80).aspx[^]

And for your CheckBox, if your application is WPF, try this:

http://wpf.2000things.com/2011/07/29/353-binding-a-three-state-checkbox-to-a-nullable-bool/[^]


If WinForm:

http://stackoverflow.com/questions/8401974/what-is-best-way-to-bind-to-tri-state-checkbox[^]

Or

http://social.msdn.microsoft.com/Forums/en/winforms/thread/c8fb99ad-d9a8-40dd-9a9d-a1f598a9a92e[^]

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