这个

cmbPosition.SelectedValue == null ？ 0 ：cmbPosition.SelectedValue;

等于：

  if （cmbPosition.SelectedValue ==  null ）
 {
 return   0 ; 
} 
其他 
 {
返回 cmbPosition。的SelectedValue; 
} 

和此：

 bnk.PartyWise = Convert.ToBoolean（cmbParty.SelectedIndex == -1？ false ： true ）

等于：

  if （cmbParty.SelectedIndex == -1）
 {
 bnk.PartyWise =  false ; 
} 
其他 
 {
 bnk.PartyWise =  true 跨度>; 
} 

i saw some coding like ....

cmbPosition.SelectedValue == null ? 0 : cmbPosition.SelectedValue;

<pre lang="c#">bnk.PartyWise = Convert.ToBoolean(cmbParty.SelectedIndex == -1 ? false : true);

i did't got the meaning of the code...
and what is the use of ?,: symbols ?????
how to use that symbols ?????

Thanks

this

cmbPosition.SelectedValue == null ? 0 : cmbPosition.SelectedValue;

is equal to:

if (cmbPosition.SelectedValue == null)
{
    return 0;
}
else
{
    return cmbPosition.SelectedValue;
}

and this:

bnk.PartyWise = Convert.ToBoolean(cmbParty.SelectedIndex == -1 ? false : true)

is equal to:

if (cmbParty.SelectedIndex == -1)
{
    bnk.PartyWise = false;
}
else
{
    bnk.PartyWise = true;
}