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Article ID: 437
Last updated: 27 Apr, 2018
Problem
How can I get the current text from a combo box whenever the user selected a new item in a combo box?
Cause
Action
If you are using CGXComboBox, you should override OnModifyCell( ) and call pControl->GetValue( ) to get the current text of the cell.
Example:
| void CGXWndEx::OnModifyCell(ROWCOL nRow, ROWCOL nCol) { |
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| CGXGridWnd::OnModifyCell(nRow, nCol); CGXControl* pControl = GetControl(nRow, nCol); pControl->GetValue(strValue); TRACE("OnModifyCell %s ", strValue ); |
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| } | ||
With CGXComboBoxWnd there is a minor problem because CComboBox sends the CBN_SELCHANGE method before it updates the edit box portion of the control. Therefore pControl->GetValue( ) returns the old value.
The following code works around that problem:
| BOOL CGXWndEx::OnCommand(WPARAM wParam, LPARAM lParam) { #if _MFC_VER <0x0300 |
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| UINT nNotification = HIWORD(lParam); HWND hCtl = (HWND) LOWORD(lParam); |
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| #else | |||
| UINT nNotification = HIWORD(wParam); HWND hCtl = (HWND) lParam; |
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| #endif | |||
| if (nNotification == CBN_SELCHANGE) { |
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| CGXComboBoxWnd* pControl = (CGXComboBoxWnd*) GetCurrentCellControl(); CString strValue; pControl->GetLBText(pControl->GetCurSel(), strValue); TRACE("Combobox changed %s ", strValue ); |
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| }
BOOL bResult = CGXGridWnd::OnCommand(wParam, lParam); |
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| } | |||
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Article ID: 437
Last updated: 27 Apr, 2018
Revision: 3
Views: 3454
Posted: 11 Jan, 2001 by
Meltreger B.
Updated: 27 Apr, 2018 by
Meltreger B.
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