Devexpress Winforms Gridview 中间的 RowSelection 复选框 state

Question

I'm using WinForms Devexpress and bumped into the following task:
Somehow I need for DevExpress GridView to programmatically set data row selection checkbox to intermediate state (as the state of the top checkbox at the header at the picture below:

I'm wondering if it is possible or how to overcome the issue.

Answer 1

You should set the column editor's AllowGrayed property to true .

this.yourBooleanColumn.ColumnEdit = this.repositoryItemCheckEdit1;    
this.repositoryItemCheckEdit1.AllowGrayed = true;