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;
- }
复制代码 这里必要注意的点就是字段范例,注意代码中的范例和数据库范例保持同等,否则插入会非常
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
- }
复制代码
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