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DataTable dt = DBDataOa.OperationData("select id from table1 where uid=1");
string str = "";
for (int i = 0; i < dt.Rows.Count; i++)
{
str += dt.Rows[i]["id"].ToString() + ",";
}
str.TrimEnd(',')//去掉最后一个 “,”
DataTable dt = DBDataOa.OperationData("select id from table1 where uid=1");
string str = "";
for (int i = 0; i < dt.Rows.Count; i++)
{
str += dt.Rows[i]["id"].ToString() + ",";
}