将数据表与C＃列表进行比较

Question

I am working on a MVC project in which i am Stuck with code where i have to compare DataTable value with C# List and Save list value in Sql Database below is my code :

private void AddNumbers(DataTable dTable)
{
    List<NumberRates> aPriceList = new List<NumberRates>();
    NumberRates priceobj = null;

    using (SLDocument sl = new SLDocument(filePath, "Pdf RATES"))
    {
        SLWorksheetStatistics stats = sl.GetWorksheetStatistics();

        for (int row = 11; row <= stats.EndRowIndex; ++row)
        {
            try
            {
                priceobj = new NumberRates();

                priceobj.destination = sl.GetCellValueAsString(row, 1);

                priceobj.a_price = sl.GetCellValueAsDecimal(row, 3);

                aPriceList.Add(priceobj);
            }
        }
    }
}

dTable columns contains name , description And Number

Now i want to compare List values with DataTable columns and if list.destination==dTable.description then list.destinatiom = dTble.Number .

Hope I am able to explain my problem .

Answer 1

You just need a loop over the NumberRates list and for each element check if the passed table contains the Destination key. If you find it then just copy the Number value to the appropriate property of the NumberRates class.

foreach(NumberRates element in aPriceList)
{
    DataRow[] match = dTable.Select("Description = '" + element.destination + "'");
    if(match.Length > 0)
        element.Number = match[0].Number;
}

or better, to avoid a second loop just add the above logic to your current code

for (int row = 11; row <= stats.EndRowIndex; ++row)
{
    try
    {
        priceobj = new NumberRates();

        priceobj.destination = sl.GetCellValueAsString(row, 1);

        priceobj.a_price = sl.GetCellValueAsDecimal(row, 3);

        aPriceList.Add(priceobj);

        DataRow[] match = dTable.Select("Description = '" + priceobj.destination + "'");
        if(match.Length > 0)
           priceobj.Number = match[0].Number;
    }

}

Note, the above code assumes that there is a one-to-one relationship between destination and description. If you have more than one record in your datatable that matches the Description search then you have to specify what you want to do with the values in the other records retrieved by the Select method.