(Convert.ToInt32(cmd.ExecuteScalar()) ==0);//不存在此表,返回false}catch(SQLiteException E) { connection.Close();thrownewException(E.Message); } } } }publicstaticintGetMaxID(stringFieldName,stringTableName) {stringstrsql ="select max("+ FieldName +")+1 from"+TableName;objectobj =GetS...
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....
};objectobj=SQLite.ExecuteScalar(sql, parameters);inti =Convert.ToInt32(obj);if(i >0) {this.label4.Text ="登录成功!";this.label4.Show(); }else{this.label4.Text ="登录失败!";this.label4.Show(); } } (6)【注册】的逻辑 privatevoidbutton1_Click(objectsender, EventArgs e){;stringna...
new SQLiteParameter("@companyname",System.Data.DbType.String), new SQLiteParameter("@addtime",System.Data.DbType.DateTime) }; paras[0].Value = TextBox1.Text; paras[1].Value = TextBox2.Text; //返回插入的主键ID //使用select last_insert_rowid()返回自增字段的值 int addid = Convert.ToI...
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) ...
int SQLITE_MISMATCH = 20; private static final int SQLITE_NOTADB = 26; @Override public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate() { return new SQLExceptionConversionDelegate() { @Override public JDBCException convert(SQLException sqlException, String message, String sql) { final ...
问从sqlite检索字符串形式的数字并转换为intEN版权声明：本文内容由互联网用户自发贡献，该文观点仅代表...
(x => x.ClassID).ToList()) { Items.Add(new SelectedItem { Value = item.ClassID.ToString(), Text = item.ClassName }); } if (string.IsNullOrWhiteSpace(Value.ClassName)) { Value.ClassName = Items.First().Text; Value.ClassID = Convert.ToInt32(Items.First().Value); } GenderItems =...
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)...
connectionString = string.Format(@"Data Source={0}\OrderWater.db;Version=3;", Application.StartupPath); 如果是使用微软的企业库EnterpriseLibary来进行数据库访问的话,那么需要在配置文件中配置数据库访问,如下所示。 注意红色框部分就可以顺利配置好Sqlite数据库的企业库配置信息了。