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增加数据 try{stringsql ="insert into"+ textBox2.Text +"(name, score) values ('"+ textBox3.Text +"',"+ Convert.ToInt32(textBox4.Text) +")"; SQLiteCommand command=newSQLiteCommand(sql, Conn); command.ExecuteNonQuery(); }catch(Exception ex) {thrownewException("插入数据:"+ textBox3....
增加数据 try{stringsql ="insert into"+ textBox2.Text +"(name, score) values ('"+ textBox3.Text +"',"+ Convert.ToInt32(textBox4.Text) +")"; SQLiteCommand command=newSQLiteCommand(sql, Conn); command.ExecuteNonQuery(); }catch(Exception ex) {thrownewException("插入数据:"+ textBox3....
privatevoidbtnCreateTable_Click(objectsender, EventArgs e){stringconnectionString ="Data Source=demo.db;Version=3;";using(varconnection =newSQLiteConnection(connectionString)) { connection.Open();stringsql ="CREATE TABLE IF NOT EXISTS users (id INTEGER PRIMARY KEY, name TEXT, age INTEGER)";using...
行28: info.Regdate = Convert.ToDateTime(reader["regdate"]).ToString("yyyy-MM-dd"); 堆栈跟踪: [FormatException: 该字符串未被识别为有效的 DateTime。] System.DateTimeParse.ParseExactMultiple(String s, String[] formats, DateTimeFormatInfo dtfi, DateTimeStyles style) +2827362System.DateTime.ParseExa...
int addid = Convert.ToInt32(SqliteHelper.ExecuteScalar(System.Data.CommandType.Text, "insert into customer values(null,@companyname,@addtime);select last_insert_rowid()", paras)); } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. ...
if (InsertData(myDb, txtFullSN.Text, Convert.ToInt32(txtMeterID.Text), txtOrderNr.Text)) { txtMessage.Text = "插入数据成功"; } else { txtMessage.Text = "插入数据失败"; } } 4. 查询数据 static List<string> ReadData(string db) ...
一个问题是下面的代码,Double localDouble1 = new Double(d1 / 100.0D);我想用C#重写它,我已经试过了int l = Convert.ToInt32(localDouble1); 它可以编译并工作,但是结果是不同的,在我的特定场景中, 浏览2提问于2011-08-17得票数 2 回答已采纳...
if (InsertData(myDb, txtFullSN.Text, Convert.ToInt32(txtMeterID.Text), txtOrderNr.Text)) { txtMessage.Text = "插入数据成功"; } else { txtMessage.Text = "插入数据失败"; } } 4. 查询数据 static List<string> ReadData(string db) ...
info.DataTypeId = Convert.ToInt32(dr["ProviderType"].ToString());info.DataType = dr["DataTypeName"].ToString().Trim();info.AutoIncrement = (bool)dr["IsAutoIncrement"];info.IsPrimaryKey = (bool)dr["IsKey"];info.Unique = (bool)dr["IsUnique"];info.IsReadOnly = (bool)...