写一个比较通用的方法,扩展一个新的格式列DataGridNumericColumn继承DataGridTextColumn,在DataGridNumericColumn类中限制输入,参考代码:
public class DataGridNumericColumn : DataGridTextColumn
{
protected override object PrepareCellForEdit(FrameworkElement editingElement, RoutedEventArgs editingEventArgs)
{
var edit = editingElement as TextBox;
edit.PreviewTextInput += Edit_PreviewTextInput;
DataObject.AddPastingHandler(edit, OnPaste);
//限制输入法切换,可避免中文输入添加到列中
InputMethod.SetIsInputMethodEnabled(edit,false);
return base.PrepareCellForEdit(editingElement, editingEventArgs);
}
private void OnPaste(object sender, DataObjectPastingEventArgs e)
{
var data = e.SourceDataObject.GetData(DataFormats.Text);
if (!IsDataValid(data)) e.CancelCommand();
}
private void Edit_PreviewTextInput(object sender, TextCompositionEventArgs e)
{
e.Handled = !IsDataValid(e.Text);
}
bool IsDataValid(object data)
{
try
{
Convert.ToInt32(data);
return true;
}
catch
{
return false;
}
}
}
参考:
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