const string bopp = "bopp";
const string cpp = "cpp";
const string sum = "sum";
string stest = "sum";
string Tsql;
switch (stest)
{
case bopp:
Tsql = "select boppcp,weeks from sto_cc_kc_chart";
break;
case cpp:
Tsql = "select cppcp,weeks from sto_cc_kc_chart";
break;
case sum:
Tsql = "select sumcp,weeks from sto_cc_kc_chart";
break;
}
SqlDataAdapter thisAdapter = new SqlDataAdapter(Tsql, thiscon); 现在的问题是在执行最后一条语句时,提示我局部变量Tsql未赋值!! 求高人指教!
const string cpp = "cpp";
const string sum = "sum";
string stest = "sum";
string Tsql;
switch (stest)
{
case bopp:
Tsql = "select boppcp,weeks from sto_cc_kc_chart";
break;
case cpp:
Tsql = "select cppcp,weeks from sto_cc_kc_chart";
break;
case sum:
Tsql = "select sumcp,weeks from sto_cc_kc_chart";
break;
}
SqlDataAdapter thisAdapter = new SqlDataAdapter(Tsql, thiscon); 现在的问题是在执行最后一条语句时,提示我局部变量Tsql未赋值!! 求高人指教!
解决方案 »
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default:
Tsql = "";
break;
==
string Tsql = string.Empty;
string Tsql = "";//给个空值也行
下面这些语句能运行?不用改成case "bopp",case "cpp",case "sum"
case bopp:
Tsql = "select boppcp,weeks from sto_cc_kc_chart";
break;
case cpp:
Tsql = "select cppcp,weeks from sto_cc_kc_chart";
break;
case sum:
Tsql = "select sumcp,weeks from sto_cc_kc_chart";
break;
或是加个:
default:
Tsql = "";
break;
都可以