List Control updates

[jagannathan thiruvengadathan]

Hai, Greetings of the day!. My doubt is how to update the data's present in the Listcontrol. I am having a List control in VC++ dialog based application, populated with some datas. As soon as i get a new data, the old data has to be updated with new one. Is there any way to solve to my problem. Please help with giving a sample program. Regards Jagan

[Rajesh R Subramanian]

Look at CListCtrl::Update and CListCtrl::RedrawItems

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Nobody can give you wiser advice than yourself. - Cicero ப்ரம்மா

[jagannathan thiruvengadathan]

Thanks Brahmma. I will try with your suggession and let you know. Regards Jagan

[Ranjoy Guha]

First use CListCtrl::DeleteAllItems() then use for(i=0; i < n; i++) CListCtrl::InsertItem(i, 0);//row, column then use for(i=0; i < n; i++) CListCtrl::SetItemText(i, 0, _T("hallo"));//row, column, value string

[Rajesh R Subramanian]

Ranjoy Guha wrote:

First use CListCtrl::DeleteAllItems()

You don't need to delete all items and redraw everything again. This is the worst way of doing it. CListCtrl::InsertItem is enough to insert new items.

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Nobody can give you wiser advice than yourself. - Cicero ப்ரம்மா

[Ranjoy Guha]

Suppose previously there was 15 items later there is 10 items then the previous 5 will stay

[Rajesh R Subramanian]

Ranjoy Guha wrote:

Suppose previously there was 15 items later there is 10 items then the previous 5 will stay

I don't understand what you tell. It is simple logic, you don't need to delete everything to add something new and display it.

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Nobody can give you wiser advice than yourself. - Cicero ப்ரம்மா

[Ranjoy Guha]

Suppose There are different Criteria 1. Student: having Properties (Name, Class, Roll, Age) 2 Teacher: having Properties (Name, Degree, Designation) And u need to update them depending on the selected Criteria(Student/Teacher) Now if you dont perform DeleteAllItems then the List Control will keep on growing with each selection. Isn't It ?

[Rajesh R Subramanian]

The OP asked how to add new data and update the view. Link[^] Now on what grounds do you ask someone to delete all items?

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Nobody can give you wiser advice than yourself. - Cicero ப்ரம்மா

[David Crow]

Ranjoy Guha wrote:

then the previous 5 will stay

This is why DeleteAllItems() should be used. It's the two for loops that you had that were in question. The second one was unnecessary.

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