[英]read text from edit control
I want to read the text which the user has typed in a Edit control. 我想阅读用户在“编辑”控件中键入的文本。 after entering the text and pressing the button, I want to get the text and add it as an item into a comboBox.
输入文本并按下按钮后,我要获取文本并将其作为项目添加到comboBox中。 this is what I am doing in
WM_COMMAND
of the parent dialog: 这是我在父对话框的
WM_COMMAND
中所做的事情:
case WM_COMMAND:
if(HIWORD(wParam) == BN_CLICKED)
{
if ((HWND)lParam == Button[0])
{
int len = GetWindowTextLengthW(Button[2]) + 1;
GetWindowTextW(Button[2], text, len);
SendMessage(Button[1],(UINT) CB_ADDSTRING,(WPARAM) 0,(LPARAM) text);
}
}
return 0;
but things goes wrong, sometime I get NULL
in the "text" variable, sometimes just the first character of the string the user has entered and sometime weird ASCII like characters. 但是出了问题,有时候我在“文本”变量中得到
NULL
,有时只是用户输入的字符串的第一个字符,有时又像字符一样奇怪的ASCII。 what am I doing wron? 我在做什么? any ideas ?
有任何想法吗 ?
You need to allocate memory for the string. 您需要为字符串分配内存。 Here's how one would expect to do it in C++03:
这是人们期望在C ++ 03中实现的方式:
std::vector<wchar_t> str(len);
GetWindowTextW(Button[2], &str[0], str.size());
SendMessageW(Button[1], CB_ADDSTRING, 0, reinterpret_cast<LPARAM>(&str[0]));
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