好像是这噶语句的错误
string strConnection = "uid=jfq;password=123456;";
strConnection += "Database=chengjibiao;Server=9AA7107A8CBE4FA;";
strConnection += "Connect Timeout=30";
SqlConnection conn = new SqlConnection("chengjibiao");
SqlDataAdapter da = new SqlDataAdapter("SQL查询语句", conn);
conn.Open();
DataTable dt = new DataTable();
da.Fill(dt);
string strConnection = "uid=jfq;password=123456;";
strConnection += "Database=chengjibiao;Server=9AA7107A8CBE4FA;";
strConnection += "Connect Timeout=30";
SqlConnection conn = new SqlConnection("chengjibiao");
SqlDataAdapter da = new SqlDataAdapter("SQL查询语句", conn);
conn.Open();
DataTable dt = new DataTable();
da.Fill(dt);
SqlConnection conn = new SqlConnection(strConnection );
conn.ConnectionTimeout =30;
SqlDataAdapter da = new SqlDataAdapter("SQL查询语句", conn);
DataTable dt = new DataTable();
da.Fill(dt);