Question

为什么我这样写无法清除编辑框内容？MFC

void CBasewindowDlg::OnButton2()
{
// TODO: Add your control notification handler code here
CEdit* pedt2 = (CEdit*)GetDlgItem(IDC_BUTTON2);
pedt2->SetDlgItemText(IDC_EDIT1," ");
}
还是不行 我是鼠标点击 BUTTON2 来清除编辑框

Answer 1

你是点击Button2来清除文本框中的信息对吧

为文本框添加一个变量
CEdit m_myEdit;

void CBasewindowDlg::OnButton2()
{
// TODO: Add your control notification handler code here
m_myEdit.SetWindowText("");
}

或者是
void CBasewindowDlg::OnButton2()
{
// TODO: Add your control notification handler code here
CEdit* pedt2 = (CEdit*)GetDlgItem(IDC_EDIT1);
pedt2->SetWindowText("");
}

或者是
void CBasewindowDlg::OnButton2()
{
// TODO: Add your control notification handler code here
SetDlgItemText(IDC_EDIT1," ");
}

Answer 2

这句:
CEdit* pedt2 = (CEdit*)GetDlgItem(IDC_BUTTON2);你是要取EDIT 应该用EDIT 的ID号 IDC_EDIT1

这句:
pedt2->SetDlgItemText(IDC_EDIT1," ");
没有必要,为什么不用 pedt2->SetWindowText("");呢

实际上在函数里你只用一句就行:
SetDlgItemText(IDC_EDIT1," ");

Answer 3

CEdit* pedt2 = (CEdit*)GetDlgItem(IDC_BUTTON2);//把IDC_BUTTON2改成IDC_EDIT1