How can we bind RDLC report from List<Entity> ?

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Hello,

I need to make a RDLC report that has concept like one-many relationship.
Suppose we have Product and their variances. and one method GetProdctList() which returning product list.
Now Need to bind report.

Here is the class :

SQL

public class Product
{
    public INT ProdId  {get;set;}
    public string Name {get;set;}
    public List<Variance> ProductVariance {get;set;}
}

public class Variance
{
  public INT ProdId {get;set;}
  public string Color {get;set;};
}

How can I implement it Please let me know your view? I tried but at the time of report design I am unable to access variance's members from the same Dataset.

Note : From front end only List of Products available.

Thanks,
Padam

Posted 24-Aug-15 5:43am

Padam Agrawal

Updated 24-Aug-15 5:45am

v2

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Maciej Los 24-Aug-15 13:57pm

Not enough information. Please, be more specific and provide more details. What have you tried? Where are you stuck?

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Maciej Los · Accepted Answer · 2015-08-24T20:26:00

As i mentioned in the comment to the question you did not provide enough information. Nevertheless...

You can use Linq[^] to get the list of products and its varances. Have a look at example:

C#

//class definition:
public class Variance
{
    private int pid = 0;
    private string c = string.Empty;

    public Variance(int _pid, string _c)
    {
        pid = _pid;
        c = _c;
    }

    public int ProdId
    {
        get{return pid;}
        set{pid = value;}
    }

    public string Color
    {
        get{return c;}
        set{c = value;}
    }
}
public class Product
{
    private int pid = 0;
    private string sname = string.Empty;
    private List<Variance> cvariances = null;

    public Product(int _pid, string _sname, List<Variance> _cvariances)
    {
        pid = _pid;
        sname = _sname;
        cvariances = _cvariances;
    }

    public int ProdId
    {
        get{return pid;}
        set{pid = value;}
    }

    public string Name
    {
        get{return sname;}
        set{sname = value;}
    }

    public List<Variance> ProductVariances
    {
        get{return cvariances;}
        set{cvariances = value;}
    }
}
//main program:
	List<product> products  = new List<product>()
	{
		new Product(1, "GummiBear", new List<variance>()
		{
			new Variance(1, "black"),
			new Variance(1, "red"),
			new Variance(1, "white")
		}),
		new Product(2, "CellPhone", new List<variance>()
		{
			new Variance(2, "blue"),
			new Variance(2, "gold")
		})
	};
	
	DataTable dt = new DataTable();
	DataColumn dc = new DataColumn("ProdId", Type.GetType("System.Int32"));
	dt.Columns.Add(dc);
	dc = new DataColumn("Name", Type.GetType("System.String"));
	dt.Columns.Add(dc);
	dc = new DataColumn("Color", Type.GetType("System.String"));
	dt.Columns.Add(dc);
	
	var result = from v in products.SelectMany(p=>p.ProductVariances.Select(pv=>pv))
		join p in products on v.ProdId equals p.ProdId
		select new object[]
			{
				p.ProdId,
				p.Name,
				v.Color
			};
        //fill datatable
	foreach (var r in result)
	{
		dt.Rows.Add(r);
	}
        //TO DO:
        //use datatable as a datasource for rdlc report

Result:

ProdId Name      Color
1      GummiBear black 
1      GummiBear red 
1      GummiBear white 
2      CellPhone blue 
2      CellPhone gold

Note: the definition of classes has been changed.

You can use CopyToDataTable extension method[^] to create DataTable object in simpler manner.