How To Recursively Call a Function Inside for Loop in C#

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Hi,I want to call a recursive function using for loop,but when it calls recursively its start from beginning value , I want to pass the all values one by one ,but my code below passes the one(same) value every time..So how can i pass the all values to the function call?

C#

protected String BottomTree(String AncestorFamilyID, ArrayList RelationPath)
    {
        ArrayList bottomMembers = new ArrayList();

        sSQL = "SELECT DISTINCT AF_MemberID FROM Family_Master";
        sSQL = sSQL + " WHERE AF_FamilyID IN(" + AncestorFamilyID + ")";

        DS2 = new DataSet();
        da2 = new OdbcDataAdapter(sSQL, conn);
        da2.Fill(DS2);

        if (DS2.Tables.Count > 0)
        {
            if (DS2.Tables["table"].Rows.Count > 0)
            {
                for (int i = 0; i < DS2.Tables["table"].Rows.Count; i++)
                {
                    bottomMembers.Add(DS2.Tables["table"].Rows[i]["AF_MemberID"].ToString());

                    if (bottomMembers[i].ToString() == lblUserToMemberID.Text)
                    {
                        return lblUserToMemberID.Text;
                    }
                    else
                    {
                        sSQL = "SELECT AF_FamilyID FROM Family_Master";
                        sSQL = sSQL + " WHERE AF_MemberID = '" + bottomMembers[i] + "'";
                        sSQL = sSQL + " AND AF_MemberType IN('H')";

                        DS3 = new DataSet();
                        da3 = new OdbcDataAdapter(sSQL, conn);
                        da3.Fill(DS3);

                        if (DS3.Tables.Count > 0)
                        {
                            if (DS3.Tables["table"].Rows.Count > 0)
                            {
                                lblUserFromFamilyID.Text = DS3.Tables["table"].Rows[0]["AF_FamilyID"].ToString();
                            }
                        }

                        return BottomTree(lblUserFromFamilyID.Text, RelationPath);
                    }
                }
            }
        }
        DS2.Dispose();
        da2.Dispose();


        return null;

    }

Any Help?

Posted 23-Feb-14 19:18pm

SVT02

Updated 23-Feb-14 20:08pm

v2

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Comments

Sergey Alexandrovich Kryukov 24-Feb-14 1:40am

Not clear at all. It needs more accurate explanation, first of all, on what you want to achieve.
—SA

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Raul Iloc · Answer 1 · 2014-02-23T20:13:00

You have to use 2 methods. First will invoke the second one and only the second will be recursive!
Here is an example by using Entity Framework:

XML

public static int[] GetCategoyWithChildrenIDList(SLOnlineShopEntities dataContext, int categoryID)
{
    List<Category> childrenTree = GetCategoryWithChildrenTreeAsList(dataContext, categoryID);
    if (childrenTree.Count < 1)
        return new int[0];
    //
    List<int> idList = new List<int>();
    //
    foreach (Category category in childrenTree)
    {
        idList.Add(category.ID);
    }
    //
    return idList.ToArray();
}

private static List<Category> GetCategoryWithChildrenTreeAsList(SLOnlineShopEntities dataContext, int categoryID)
{
    List<Category> childrenTree = new List<Category>();
    Category mainCategory = dataContext.Categories.FirstOrDefault(c => c.ID == categoryID && (c.Inactive == false || c.Inactive == null));
    if (mainCategory == null)
        return childrenTree;
    //
    childrenTree.Add(mainCategory);
    List<Category> directChildrenList = dataContext.Categories.Where(c => c.ParentID == categoryID && (c.Inactive == false || c.Inactive == null)).ToList();
    if (directChildrenList.Count == 0)
        return childrenTree;
    //
    childrenTree.AddRange(directChildrenList);
    //
    foreach (Category category in directChildrenList)
    {
        List<Category> tempList = GetCategoryWithChildrenTreeAsList(dataContext, category.ID);
        if (tempList.Count > 0)
            childrenTree.AddRange(tempList);
    }
    //
    return childrenTree;
}

King Fisher · Answer 2 · 2014-02-23T20:30:00

Solution 2

i think ,you are looking for this

Recursive queries using Common table expression

Posted 23-Feb-14 20:30pm

King Fisher