我有一个bool,编译器说在当前作用域中不存在,但是所有其他变量都以相同的位置/方式声明和使用。下面的代码,一些类名更改和代码简化,但结构保持不变。
iDReq does not exist in the current context
if (button.Click) {
string sourceFileName = "";
string destPathFileName = "";
int exportCount = 0;
bool iDReq = true;
iDReq = (System.Windows.Forms.MessageBox.Show("Include ID in file names?", "ID",MessageBoxButtons.YesNo,MessageBoxIcon.Question) == DialogResult.Yes);
foreach (KeyValueCollection item in SearchControl.SelectedItems)
{
Class.Document doc = Class.Document.GetDocument((long)item["id"].Value);
{
sourceFileName = @"\\server\share" + @"\" + Convert.ToString(doc.GetExtraInfo("docFileName"));
string fileExtension = System.IO.Path.GetExtension(sourceFileName);
//Line below is the one that the compiler does not like.
iDReq = true ? destPathFileName = destPath + @"" + doc.Description + " " + "(" + doc.ID + ")" + fileExtension : destPathFileName = destPath + @"" + doc.Description + fileExtension;
try {
System.IO.Directory.CreateDirectory(destPath);
System.IO.File.Copy(sourceFileName,destPathFileName,true);
System.Windows.Forms.Clipboard.SetText(destPathFileName);
exportCount ++;
}
catch(Exception ex)
{
ErrorBox.Show(ex);
}
}
}
}
是因为它是一个布尔值还是我错过了其他东西?
答案 0 :(得分:1)
我认为你的三元写得不好,但我不确定你想要什么。我会把它重写为普通的if/else
。我喜欢三元运算符,但它只是糖。
我认为你正在寻找这个:
destPathFileName = iDReq == true
? (destPath + @"" + doc.Description + " " + "(" + doc.ID + ")" + fileExtension)
: (destPath + @"" + doc.Description + fileExtension);
和iDReq == true
是超级的。
你也可以写:
destPathFileName = destPath + @"" + doc.Description
+ (iDReq ? " (" + doc.ID + ")" : string.Empty)
+ fileExtension;
顺便说一下,@""
是string.Empty
。
并使用字符串插值:
destPathFileName = destPath + doc.Description
+ (iDReq ? $" ({doc.ID})" : string.Empty)
+ fileExtension;
答案 1 :(得分:1)
试试这个:
destPathFileName = iDReq ? destPath + @"" + doc.Description + " " + "(" + doc.ID + ")" + fileExtension : destPath + @"" + doc.Description + fileExtension;