发生了某种事情，导致我的代码总是捕获了Enter键，但从未对其进行处理。含义all我的数据输入框，网格控件等已损坏。就像Enter键已关闭。
我已经尝试完全删除ProcessCmdKey例程，并且仍在执行此操作。
我有一段相当长的代码来处理选项卡式表单上的enter键，但是它弄乱了其他选项卡，这意味着每当按下[[enter时，它就会捕获它。
所以，我只是检查一下它所在的标签，如果标签不正确，就忽略它，简单吗？号出于任何原因，无论
做什么我做的表单都不会处理回车键。
我回到最基本的代码：protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
return base.ProcessCmdKey(ref msg, keyData);
}
根据我的理解，以上内容实际上不应该执行任何操作，只需将按下的键传递回去然后对其进行处理。键之外的所有内容都有效。如果我有一个文本框或任何控件，则它将接受所有输入，但是它将完全忽略enter键。我也尝试过而且这对除
enter
return false;，但这不起作用。我什至完全尝试过removing例程，并且still坏了。重新启动VS，以防万一。
编辑：好的，这是我开始“修复”问题之前的完整原始代码。这可以正常工作，只不过它使Enter键无法在程序中的anywhere
上运行。您可以想象的是，最终用户对此并不十分满意。protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
if (ActiveControl.Name.ToString() != "order_creation_grid") //ensures that we don't caputre keypresses in the datagrid
{
//if (keyData == (Keys.Tab | Keys.Shift)) //tabbing backwards
//{
// if (ActiveControl.Parent.Name.ToString() == "order_con_name_DD")
// {
// order_con_name_DD.Select();
// order_con_name_DD.ShowDropDown();
// }
//}
if (keyData == Keys.Tab || keyData == Keys.Enter)
{
if (ActiveControl.Parent.Name.ToString() == "order_shipper_dd")
{
var test = keyData;
//getAllConsignees(); remove
get_all_addresses(); //load up the address dd
order_address_dd.SelectedIndex = 0;
order_address_dd.Select();
order_address_dd.Focus();
return true;//lets the system know that the control key was handled and not to fire it again
}
else if (ActiveControl.Parent.Name.ToString() == "order_address_dd")
{
if (order_address_dd.SelectedIndex != -1)//only do this if there is not a new address in the address chooser ie: found one in database
{
order_match_dd.Select();
order_match_dd.Focus();
order_match_dd.ShowDropDown();
return true;
}
else
{
order_address_eb.Value = order_address_dd.Text;
order_consignee_eb.Select();
order_consignee_eb.Focus();
return true; ;
}
}
else if (ActiveControl.Name.ToString() == "order_match_dd")
{
if (order_match_dd.SelectedIndex != -1)//fire off when a valid selection is made
{
//check if it is a new item
if (order_match_dd.Text == "1 New")
{
//blank out the fields and position cursor to Consignee
clear_order_fields();
order_consignee_eb.Select();
order_consignee_eb.Focus();
}
else //parse the value in the match box useing the seperator | into strings and load up the correct fields
{
char[] delimiterChars = { '|' };
string[] fields = order_match_dd.Text.Split(delimiterChars);
clear_order_fields();
order_consignee_eb.Value = fields[0].ToString().Trim(); ;
order_address_eb.Value = fields[1].ToString().Trim();
order_city_eb.Value = fields[2].ToString().Trim();
order_state_eb.Value = fields[3].ToString().Trim();
order_zip_eb.Value = fields[4].ToString().Trim();
//go try and match the driver and facility with this zipcode
get_driver_facility();
order_BOL_eb.Select();
order_BOL_eb.Focus();
}
return true;
}
}
else if (ActiveControl.Parent.Name.ToString() == "order_BOL_eb")
{
int custID = Convert.ToInt16(order_shipper_dd.SelectedValue);
string testFor = order_BOL_eb.Value.ToString();
var lookFor = (from l in dbContext.stop_details
where l.cust_unique_id == testFor && l.customer_id == custID
select l).ToArray();
int count = lookFor.Count();
if (count > 0)
{
MessageBox.Show("WARNING..this BOL has been used before for this customer, make sure you really want to use it again.");
}
order_loose_qty.Focus();
return true;
}
else if (ActiveControl.Parent.Name.ToString() == "order_consignee_eb")
{
order_address_eb.Select();
order_address_eb.Focus();
return true;
}
else if (ActiveControl.Parent.Name.ToString() == "order_address_eb")
{
order_city_eb.Select();
order_city_eb.Focus();
return true;
}
else if (ActiveControl.Parent.Name.ToString() == "order_city_eb")
{
order_state_eb.Select();
order_state_eb.Focus();
return true;
}
else if (ActiveControl.Parent.Name.ToString() == "order_state_eb")
{
order_zip_eb.Select();
order_zip_eb.Focus();
return true;
}
else if (ActiveControl.Parent.Name.ToString() == "order_zip_eb")
{
// get_driver_facility();
order_BOL_eb.Select();
order_BOL_eb.Focus();
return true;
}
else if (ActiveControl.Parent.Name.ToString() == "order_note")
{
//auto send to the grid if checkboxed
if (autoSend_cb.Checked)
{
send_to_orderGrid();
}
//otherwise just sit there...
return true;
}
}
if (keyData == Keys.Enter) //On enter key for these controls fire the tab key so that it will move to the next control
{
if (ActiveControl.Parent.Name.ToString() == "order_loose_weight")
{
SendKeys.Send("{TAB}");
}
else if (ActiveControl.Parent.Name.ToString() == "order_loose_qty")
{
SendKeys.Send("{TAB}");
}
else if (ActiveControl.Parent.Name.ToString() == "order_pallets_qty")
{
SendKeys.Send("{TAB}");
}
else if (ActiveControl.Parent.Name.ToString() == "order_pallets_weight")
{
SendKeys.Send("{TAB}");
}
else if (ActiveControl.Parent.Name.ToString() == "order_hazmat_weight")
{
SendKeys.Send("{TAB}");
}
else if (ActiveControl.Parent.Name.ToString() == "order_COD")
{
SendKeys.Send("{TAB}");
}
}
if (keyData == (Keys.Control | Keys.OemCloseBrackets))
{
this.order_shipper_dd.Select();
this.order_shipper_dd.ShowDropDown();
return true;
}
if (keyData == (Keys.Control | Keys.Enter)) //when ctrl-enter is pressed in the Order Entry screen
{
send_to_orderGrid();
return true;
}
}
return base.ProcessCmdKey(ref msg, keyData);
}
我什至可以注释掉例程，它仍然会执行。entire
1-您是否希望Enter键在文本框中执行换行？将AcceptsReturn属性从False更改为True，并且您的文本框应允许您使用Enter键创建新行。
2-使用Enter键跳到下一个控件？将keyDown事件添加到文本框中，然后执行以下操作：
switch (e.KeyCode)
{
case Keys.Enter:
SendKeys.Send("{TAB}");
break;
}
private void Form1_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
{
if (e.KeyCode == Keys.Return)
e.IsInputKey = true;
}
关于它的作用很明显，但是它现在应该可以解决您的情况。有帮助吗？