数据库结构为：

public static string connting = "数据库路径：如：D:\\xxx.mdb";//插入public bool InsertToFile(string casenumber, int lastrowid, int pagecount){bool result = true;try{string connString = $"Provider=Microsoft.Jet.OLEDB.4.0;Data Source={connting};";using (var conn = new OleDbConnection(connString)){conn.Open();var sql = @"INSERT INTO [file] ([顺序号], [案卷号], [案卷题名], [卷内页数文件], [卷内页数图纸], [卷内页数其他],[备注]) VALUES (@value1, @value2, @value3, @value4, @value5, @value6,@value7)";using (var cmd = new OleDbCommand(sql, conn)){cmd.Parameters.Add(new OleDbParameter("@value1", OleDbType.Integer) { Value = 1 });cmd.Parameters.Add(new OleDbParameter("@value2", OleDbType.VarChar) { Value = casenumber });cmd.Parameters.Add(new OleDbParameter("@value3", OleDbType.VarChar) { Value = "目录索引" });cmd.Parameters.Add(new OleDbParameter("@value4", OleDbType.Integer) { Value = pagecount });cmd.Parameters.Add(new OleDbParameter("@value5", OleDbType.Integer) { Value = 0 });cmd.Parameters.Add(new OleDbParameter("@value6", OleDbType.VarChar) { Value = "" });cmd.Parameters.Add(new OleDbParameter("@value7", OleDbType.VarChar) { Value = "" });cmd.ExecuteNonQuery();}}}catch (Exception ex){result = false;Logger.Error("插入[file]表异常！详情：" + ex.Message);}return result;}//查询
public void QueryData()
{try{string connString = $"Provider=Microsoft.Jet.OLEDB.4.0;Data Source={connting};";using (var conn = new OleDbConnection(connString)){conn.Open();var sql = "SELECT * FROM [file] WHERE [顺序号] = @orderNumber";using (var cmd = new OleDbCommand(sql, conn)){cmd.Parameters.Add(new OleDbParameter("@orderNumber", OleDbType.Integer) { Value = 1 });using (var reader = cmd.ExecuteReader()){while (reader.Read()){// 处理查询结果string casenumber = reader.GetString(reader.GetOrdinal("案卷号"));string title = reader.GetString(reader.GetOrdinal("案卷题名"));// 其他列的处理类似Console.WriteLine($"案卷号: {casenumber}, 案卷题名: {title}");}}}}}catch (Exception ex){Logger.Error("查询[file]表异常！详情：" + ex.Message);}
}//修改
public bool UpdateData(string casenumber, int pagecount)
{bool result = true;try{string connString = $"Provider=Microsoft.Jet.OLEDB.4.0;Data Source={connting};";using (var conn = new OleDbConnection(connString)){conn.Open();var sql = "UPDATE [file] SET [卷内页数文件] = @pagecount WHERE [案卷号] = @casenumber";using (var cmd = new OleDbCommand(sql, conn)){cmd.Parameters.Add(new OleDbParameter("@pagecount", OleDbType.Integer) { Value = pagecount });cmd.Parameters.Add(new OleDbParameter("@casenumber", OleDbType.VarChar) { Value = casenumber });int rowsAffected = cmd.ExecuteNonQuery();if (rowsAffected == 0){result = false;Logger.Error("未找到符合条件的记录！");}}}}catch (Exception ex){result = false;Logger.Error("更新[file]表异常！详情：" + ex.Message);}return result;
}

这里需要注意的点就是字段类型，注意代码中的类型和数据库类型保持一致，否则插入会异常

枚举为：

public enum OleDbType{BigInt = 20,Binary = 0x80,Boolean = 11,BSTR = 8,Char = 129,Currency = 6,Date = 7,DBDate = 133,DBTime = 134,DBTimeStamp = 135,Decimal = 14,Double = 5,Empty = 0,Error = 10,Filetime = 0x40,Guid = 72,IDispatch = 9,Integer = 3,IUnknown = 13,LongVarBinary = 205,LongVarChar = 201,LongVarWChar = 203,Numeric = 131,PropVariant = 138,Single = 4,SmallInt = 2,TinyInt = 0x10,UnsignedBigInt = 21,UnsignedInt = 19,UnsignedSmallInt = 18,UnsignedTinyInt = 17,VarBinary = 204,VarChar = 200,Variant = 12,VarNumeric = 139,VarWChar = 202,WChar = 130}