textppres后，keypres不会触发 [英] keypres doesnt fire after textchanged

问题描述

大家好我有一个文本框，其中有两个事件，第一个是txtsearch_TextChanged，它自动完成另一个是txtsearch_KeyPress，其中传递数据点击进入txtsearch_TextChanged stop txtsearch_KeyPress解雇



怎么能我让他们两个一个接一个地工作，然后第一个文本更改然后按键事件没有问题？



编辑：复制评论：

hi everybody i have atextbox which have two events first txtsearch_TextChanged which fire to autocomplete the other is txtsearch_KeyPress which pass data in click enter txtsearch_TextChanged stop txtsearch_KeyPress firing

how can i make both of them work one after the other textchanged first then keypress event without problem ?

Copied from comments:

private void txtsearch_KeyPress(object sender, KeyPressEventArgs e)
{


if (e.KeyChar == 13)
{

string Str = txtsearch.Text.Trim();
double Num;
bool isNum = double.TryParse(Str, out Num);
if (isNum)
{

// search by barcode

prd = new BLL();
DataTable dta = new DataTable();

dta = prd.findbybarcode(txtsearch.Text);

txtid.DataBindings.Clear();
txtid.DataBindings.Add("text", dta, "ID");

txtproductname.DataBindings.Clear();
txtproductname.DataBindings.Add("text", dta, "proname");

txtprice.DataBindings.Clear();
txtprice.DataBindings.Add("text", dta, "price");

txtunit.DataBindings.Clear();
txtunit.DataBindings.Add("text", dta, "Unit");

txtcount.Focus();

}

}
}


private void txtsearch_TextChanged(object sender, EventArgs e)
{
txtsearch.AutoCompleteMode = AutoCompleteMode.Suggest;
txtsearch.AutoCompleteSource = AutoCompleteSource.CustomSource;
AutoCompleteStringCollection DataCollection = new AutoCompleteStringCollection();
getData(DataCollection);
txtsearch.AutoCompleteCustomSource = DataCollection;


}

推荐答案

我已经尝试过您的代码。



据我所知，输入密钥不再处理 txtsearch.AutoCompleteMode = AutoCompleteMode.Suggest; 已经运行。哪种有意义 - 输入键将用于从可能的自动完成条目列表中选择。



因为您没有过滤自动完成集合，为什么没有在 Form_Load 或 txtsearch_Enter 事件之一中设置？ Enter键仍然不起作用，但文本框的行为更好。



我不知道key_leave事件是什么。如果你的意思是 txtSearch_Leave 事件，它对你的自动完成没有帮助。



如果你真的想捕获然后输入密钥然后尝试使用 txtsearch_KeyUp 事件



我还尝试了事件的顺序通过播放我连接它们的命令来解雇。它似乎没有相关性 - 例如，连接事件的顺序

I've experimented with your code.

As far as I can tell the Enter key is no longer handled once txtsearch.AutoCompleteMode = AutoCompleteMode.Suggest; has been run. Which sort of makes sense - the Enter key would be used to pick from the list of possible auto-complete entries.

As you are not filtering the autocomplete collection, why not set that up in one of the Form_Load or txtsearch_Enter events? The Enter key will still not work, but the behaviour of the text box is better.

I have no idea what the key_leave event is. If you meant the txtSearch_Leave event it won't help with your autocomplete.

If you really want to capture the Enter key then try using the txtsearch_KeyUp event instead

I also experimented with the order of the events that were fired by playing about with the order that I wired them up. It doesn't appear to be relevant - for example this order of wiring up the events

this.txtsearch.KeyUp += new System.Windows.Forms.KeyEventHandler(this.txtsearch_KeyUp);
this.txtsearch.TextChanged += new System.EventHandler(this.txtSearch_TextChanged);
this.txtsearch.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.txtSearch_KeyPress);

仍然导致事件的顺序

key pressed
text changed
key up

（正如我尝试过的其他订单组合一样）

(As did the other combinations of order that I tried)

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