Then I will naturally find the next control of the control, then focus (), through Page. controls can be found, but I think this may not avoid hardCode, because it is difficult to judge whether a Control can focus () in the server segment ().
I have found some materials.
Inspired by this, I thought that I had the control that triggered the PostBack get the focus, and then triggered a tab key event. The focus would naturally move to the next control, so I had a hard time, I got a conclusion that this is not feasible. Why not? I don't know. The test code is as follows:
<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head id = "Head1" runat = "server">
<Title> Untitled Page </title>
<Script>
Function ControlFocus (){
Var Ka = document. createEventObject ();
Ka. ctrlKey = false;
Ka. keyCode = 9;
Document. fireEvent ("onkeydown", Ka );
}
Document. onkeydown = new Function ("if (event. keyCode = 9) {alert ('tab ');}");
// This event is only used for testing.
</Script>
</Head>
<Body>
<Form id = "form1" runat = "server">
<Div>
<Input type = "text" id = "test" style = "color: Red; border: 0;" onblur = "ControlFocus ();"/>
<Asp: TextBox ID = "TextBox1" runat = "server"> </asp: TextBox>
<Asp: TextBox ID = "TextBox2" runat = "server"> </asp: TextBox>
<Asp: TextBox ID = "TextBox3" runat = "server"> </asp: TextBox>
<Asp: TextBox ID = "TextBox4" runat = "server"> </asp: TextBox>
<Asp: TextBox ID = "TextBox5" runat = "server"> </asp: TextBox> </div>
</Form>
</Body>
</Html>
In my opinion, when test loses focus, an event is triggered to call the ControlFocus () function, and a Tab key is triggered. As a result, the Tab key is triggered ('tab' is displayed during testing '), but the focus is not transferred to the next control. I can't explain it even if I have checked a lot of information. I think since I can use the enter key to convert it to the tab key control focus, it should have the same effect when I program the tab key, but the result is not, there is no relevant explanation on the Internet. Some experts may want to explain it.
No way, you can only find the next control on the server side to achieve this. Although there is not much technical content, I will send it to you for a look:
// Here is the focus control written in the configuration file, because a third-party control is used.Private bool isFocusAble (string ControlType)
{
If (FocusAbleControlList. IndexOf ("," + ControlType + ",") <0)
{
Return false;
}
Else
{
Return true;
}
}
Protected override void OnLoad (EventArgs e)
{
Base. OnLoad (e );
If (Request. Form ["_ EVENTTARGET"]! = Null)
{
Control ocontrol = this. FindControl (Request. Form ["_ EVENTTARGET"]);
If (ocontrol! = Null)
{
Foreach (Control con in this. Controls)
{
// When there are multiple from statements, hardcode is used here.
If (con. ID! = Null & con. ID. ToLower (). IndexOf ("form")>-1 ){
Int index = con. Controls. IndexOf (ocontrol );
If (index! =-1)
{
Bool isableFocous = false;
While (! IsableFocous)
{
Index ++;
String [] temp = con. Controls [index]. ToString (). Split ('.');
String typename = temp [temp. Length-1];
IsableFocous = isFocusAble (typename );
}
Con. Controls [index]. Focus ();
}
}
}
}
}
}
I hope you can see your ideas. I think there should be a simpler way to implement this function.
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