这是我必须编写的代码，但上面提到的错误是在第一个if中抛出的。我怎么能删除这个错误？
for (int i = 0; i < dt.Rows.Count; i++)
{
try
{
comment = dt.Rows[i]["Comment"].ToString();
dt.Rows[i]["Comment"] = comment.Replace(System.Environment.NewLine, " ");
data = "2" + "|" +
dt.Rows[i]["XXXXXXXXXX"].ToString() + "|" +
dt.Rows[i]["XXXXXXXXXX"].ToString() + "|" +
dt.Rows[i]["XXXXXXXXXX"].ToString() + "|" +
dt.Rows[i]["XXXXXXXXXX"].ToString() + "|" +
dt.Rows[i]["XXXXXXXXXX"].ToString() + "|" +
if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "16")
{
"26" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "1")
{
"DA" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "2")
{
"PC" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "3")
{
"CC" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "22")
{
"PI" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "26")
{
"ED" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "27")
{
"20" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "28")
{
"ED" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "30")
{
"MI" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "31")
{
"12" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "32")
{
"21" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "33")
{
"21" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "34")
{
"21" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "35")
{
"MB" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "49")
{
"NP" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "51")
{
"NP" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "53")
{
"NP" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "100")
{
"CP" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "140")
{
"12" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "141")
{
"ED" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "149")
{
"MB" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "177")
{
"MI" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "178")
{
"MI" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "179")
{
"MI" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "180")
{
"MI" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "200")
{
"20" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "202")
{
"NP" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "204")
{
"15" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "224")
{
"12" + "|||";
}
else if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "227")
{
"MI" + "|||";
}
using (StreamWriter sw = File.AppendText(StmtqltyFile))
{
sw.WriteLine(data);
}
}
catch (Exception ex)
{
WriteLog("Error: " + ex.Message);
}
}
答案 0 :(得分：1)
我宁愿消除所有if并将相应的值放入词典：
private static Dictionary<String, String> s_RowToValue = new Dictionary<String, String>() {
{"16", "26|||"},
{"2", "PC|||"},
...
{"227", "MI|||"},
};
在这种情况下，所有if都将变为
String key = dt.Rows[i]["XXXXXXXXXX"].ToString();
if (s_RowToValue.ContainsKey(key))
data += s_RowToValue[key];
答案 1 :(得分：0)
您似乎忘了将值分配给if
中的某个变量if (dt.Rows[i]["XXXXXXXXXX"].ToString() == "16")
{
somevar = "26" + "|||";
}
我建议您使用switch case代替多个if else，如下所示：
switch (dt.Rows[i]["XXXXXXXXXX"].ToString())
case "16" : somevar = "26" + "|||";
break;
case "1" : somevar = "DA" + "|||";
break;
case "2" : somevar = "PC" + "|||";
break;
case "3" : somevar = "CC" + "|||";
break;
......
答案 2 :(得分：0)
您需要将值分配给变量。
请参考以下代码。
尝试使用switch case代替if else
var data = "2" + "|" +
dt.Rows[i]["XXXXXXXXXX"] + "|" +
dt.Rows[i]["XXXXXXXXXX"] + "|" +
dt.Rows[i]["XXXXXXXXXX"] + "|" +
dt.Rows[i]["XXXXXXXXXX"] + "|" +
dt.Rows[i]["XXXXXXXXXX"] + "|";
switch (dt.Rows[i]["XXXXXXXXXX"].ToString())
{
case "16":
data += "26" + "|||";
break;
case "1":
data += "DA" + "|||";
break;
case "2":
data += "PC" + "|||";
break;
case "3":
data += "CC" + "|||";
break;
case "22":
data += "PI" + "|||";
break;
case "26":
data += "ED" + "|||";
break;
case "27":
data += "20" + "|||";
break;
case "28":
data += "ED" + "|||";
break;
case "30":
data += "MI" + "|||";
break;
case "31":
data += "12" + "|||";
break;
case "32":
data += "21" + "|||";
break;
case "33":
data += "21" + "|||";
break;
case "34":
data += "21" + "|||";
break;
case "35":
data += "MB" + "|||";
break;
case "49":
data += "NP" + "|||";
break;
case "51":
data += "NP" + "|||";
break;
case "53":
data += "NP" + "|||";
break;
case "100":
data += "CP" + "|||";
break;
case "140":
data += "12" + "|||";
break;
case "141":
data += "ED" + "|||";
break;
case "149":
data += "MB" + "|||";
break;
case "177":
data += "MI" + "|||";
break;
case "178":
data += "MI" + "|||";
break;
case "179":
data += "MI" + "|||";
break;
case "180":
data += "MI" + "|||";
break;
case "200":
data += "20" + "|||";
break;
case "202":
data += "NP" + "|||";
break;
case "204":
data += "15" + "|||";
break;
case "224":
data += "12" + "|||";
break;
case "227":
data += "MI" + "|||";
break;
}