90 lines
2.9 KiB
C#
90 lines
2.9 KiB
C#
using System.ComponentModel.Design;
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namespace ConsoleApp2;
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public class DataRecord
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{
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public static bool TryGetField(DataRecord record, string columnName, out string value)
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{
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value = string.Empty;
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if (record.Headers is null)
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throw new InvalidOperationException("Cannot get field when headers of a record have not been set.");
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var idx = Array.IndexOf(record.Headers, columnName); //可能可以优化
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if (idx == -1)
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return false;
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value = record.Fields[idx];
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return true;
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}
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public static string GetField(DataRecord record, string columnName)
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{
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if (record.Headers is null)
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throw new InvalidOperationException("Headers have not been set.");
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var idx = Array.IndexOf(record.Headers, columnName);
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if (idx is -1)
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throw new IndexOutOfRangeException("Column name not found in this record.");
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return record.Fields[idx];
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}
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public string[] Fields { get; }
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public string[] Headers { get; }
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public string TableName { get; }
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public string? Database { get; set; }
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public int CompanyID { get; set; }
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public DataRecord(string[] fields, string tableName, string[] headers, int companyID=0)
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{
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if (fields.Length != headers.Length)
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throw new ArgumentException(
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$"The number of fields does not match the number of headers. Expected: {headers.Length} Got: {fields.Length} Fields: {string.Join(',', fields)}",
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nameof(fields));
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Fields = fields;
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TableName = tableName;
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Headers = headers;
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CompanyID = companyID;
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}
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public string this[int index]
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{
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get => Fields[index];
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set => Fields[index] = value;
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}
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public string this[string columnName] => GetField(this, columnName);
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public int Count => Fields.Length;
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public bool TryGetField(string columnName, out string value) => TryGetField(this, columnName, out value);
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public bool SetField(string columnName, string value) => SetField(this, columnName,value);
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public string GetCacheKey(string columnName) => GetCacheKey(this, columnName);
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public bool SetField( DataRecord record,string columnName,string value)
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{
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if (record.Headers is null)
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throw new InvalidOperationException("Headers have not been set.");
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var idx = Array.IndexOf(record.Headers, columnName);
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if (idx is -1)
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throw new IndexOutOfRangeException("Column name not found in this record.");
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record.Fields[idx] = value;
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return true;
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}
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public string GetCacheKey(DataRecord record, string columnName)
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{
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if (TryGetField(record, columnName, out var value))
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{
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return $"{TableName}_{value}";
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}else
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throw new IndexOutOfRangeException($"Column name:{columnName} not found in this record.");
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}
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} |