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POHow to import/parse collection data?
 

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  1. POHow to import/parse collection data?
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    <p>I have a project that creates Excel files and I'd like to add some import functionality. In a nutshell I'd like to give users the ability to code the following:</p> <p><code>worksheet.Cell(1, 1).Value = collectionObject;</code></p> <p>(Where collectionObject implements IEnumerable)</p> <p>How can I parse an IEnumerable of any type and extract the values of each item's properties and fields?</p> <p>This is my failed attempt:</p> <pre><code>class Program { static void Main(string[] args) { // It fails with a list of strings var listOfStrings = new List&lt;String&gt;(); listOfStrings.Add("House"); listOfStrings.Add("Car"); new ParseCollections().ParseCollection(listOfStrings, 1, 1); // Get error "Parameter count mismatch." when calling info.GetValue(m, null).ToString() // The property is an array "Chars". // I tried filtering the property with "info as IEnumerable == null" but it doesn't catch it. // How can I filter collection properties here? // It works with a list of POCO var listOfPOCO = new List&lt;Person&gt;(); listOfPOCO.Add(new Person() { Name = "John", Age = 30 }); listOfPOCO.Add(new Person() { Name = "Jane", Age = 25 }); new ParseCollections().ParseCollection(listOfPOCO, 1, 1); } class Person { public String Name { get; set; } public Int32 Age { get; set; } } } class ParseCollections { public void ParseCollection(Object collectionObject, Int32 initialRow, Int32 initialColumn) { var asEnumerable = collectionObject as IEnumerable; if (asEnumerable != null) { var ro = initialRow; foreach (var m in asEnumerable) { var co = initialColumn; var fieldInfo = m.GetType().GetFields(); foreach (var info in fieldInfo) { Console.WriteLine("Cell({0}, {1}) = {2}", ro, co, info.GetValue(m).ToString()); co++; } var propertyInfo = m.GetType().GetProperties(); foreach (var info in propertyInfo) { Console.WriteLine("Cell({0}, {1}) = {2}", ro, co, info.GetValue(m, null).ToString()); co++; } ro++; } } } } </code></pre>
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    1. USNate
    1. USManuel
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    1. COWhen you say "failed" - what happens?
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      1. USMarc Gravell
    2. COI modified the example a little bit to make it clearer. It works with a list of POCO objects but it fails with a list of Strings. How can I make it work with a list of String, Int32, etc.?
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