【发布时间】:2017-08-08 13:56:54
【问题描述】:
发生了一些事情,导致我的代码总是捕获 Enter 键但从未处理它。意思是所有我的数据输入框、网格控件等都坏了。这就像 Enter 键已被关闭。
我已尝试完全删除 ProcessCmdKey 例程,但它仍在执行此操作。
我有一段相当长的代码来处理选项卡式表单上的 enter 键,但它弄乱了其他选项卡,这意味着每当按下 enter它会捕获它。
所以,我只是检查了它在哪个标签上,如果不是正确的标签,就忽略它,简单吗?没有。
无论出于何种原因,无论做什么,我的表单都不会处理回车键。
我又回到了最基本的代码:
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
return base.ProcessCmdKey(ref msg, keyData);
}
据我了解,上述内容应该什么都不做,只需将按下的键传回去,然后处理它。
这适用于除了 enter 键之外的所有内容。如果我有一个文本框或任何控件,那么它将接受所有输入,但它只是完全忽略了 enter 键。我也试过return false;,但还是不行。
我什至尝试过完全删除例程,但它仍然坏了。重新启动VS以防万一。
编辑: 好的,这是我开始“修复”之前的完整原始代码。这可以正常工作,除了它会阻止 Enter 键在程序中的其他地方工作任何地方。正如您可以想象的那样,最终用户并不十分欣赏。
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 整个 例程,它仍然可以这样做。
【问题讨论】:
-
你的第一行有一个
return! -
第一行代码返回,下面所有代码都无法访问。
-
是的……我知道。忽略它的其余部分。它仍然锁定了我的返回键。
标签: c# winforms controls keystroke