{"id":1543,"date":"2013-06-06T12:44:09","date_gmt":"2013-06-06T10:44:09","guid":{"rendered":"http:\/\/mariusbancila.ro\/blog\/?p=1543"},"modified":"2013-06-06T12:44:09","modified_gmt":"2013-06-06T10:44:09","slug":"bindings-for-datagridview-hosted-in-an-mfc-application","status":"publish","type":"post","link":"https:\/\/mariusbancila.ro\/blog\/2013\/06\/06\/bindings-for-datagridview-hosted-in-an-mfc-application\/","title":{"rendered":"Bindings for DataGridView hosted in an MFC application"},"content":{"rendered":"

A WinForms DataGridView<\/tt> control has the ability to automatically generate its columns and populate from a specified data source (which can be a DataSet<\/tt>, a simple list or something else). All you have to do is something like this:<\/p>\n

\r\nvar list = new List<Record>() {new Record() {Id = 1, Name = \"item 1\", Date = DateTime.Now}};\r\n\r\nthis.dataGridView.AutoGenerateColumns = true;\r\nthis.dataGridView.DataSource = list;\r\n<\/pre>\n
When you do the same in MFC, it doesn’t work (supposing that you followed all the steps for hosting a WinForms control in an MFC application as described in MSDN<\/a>). <\/p>\n
\r\nm_dgv->AutoGenerateColumns = true;\r\nauto source = gcnew System::Collections::Generic::List<Record^>();\r\nauto r1 = gcnew Record();\r\nr1->Id = 1;\r\nr1->Name = \"item 1\";\r\nr1->Date = System::DateTime::Now;\r\nsource->Add(r1);\r\n\r\nm_dgv->DataSource = source;\r\n<\/pre>\n
\"dgv1\"<\/a><\/p>\n
After debugging through the .NET framework sources I realized the problem was that the BindingContext<\/a> property of the DataGridView<\/tt> control was null<\/tt>. This property represents a manager of the list of bindings for the control. If this is null<\/tt> then the control will use the binding context of the parent, which is usually a WinForms form. However, in this MFC application there is no WinForms form and the parent of the DataGridView<\/tt> control is null<\/tt>, which means the control does not have a bindings manager, and no bindings can be set. <\/p>\n
The solution is to explicitly set the BindingsContext<\/tt> property to an existing binding context (a new object) before setting the data source.<\/p>\n
\r\nm_dgv->BindingContext = gcnew System::Windows::Forms::BindingContext();\r\nm_dgv->DataSource = source;\r\n<\/pre>\n
\"dgv2\"<\/a><\/p>\n
The lesson learned is that when you host a WinForms control in an MFC application some things won’t just work out of the box, if they rely on a parent form functionality. There is no such WinForms form and you might need to do additional manual initialization.<\/p>\n","protected":false},"excerpt":{"rendered":"
A WinForms DataGridView control has the ability to automatically generate its columns and populate from a specified data source (which can be a DataSet, a simple list or something else). All you have to do is something like this: var list = new List<Record>() {new Record() {Id = 1, Name = “item 1”, Date = … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","advgb_blocks_editor_width":"","advgb_blocks_columns_visual_guide":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[13,11,7,12,8,358],"tags":[454,360,361,359,453,34,464],"class_list":["post-1543","post","type-post","status-publish","format-standard","hentry","category-net","category-csharp","category-c","category-mfc","category-windows-programming","category-winforms","tag-net","tag-bindings","tag-ccli","tag-datagridview","tag-mfc","tag-vc","tag-winforms"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t