UpdateGetCompinentId.cs

public string getcomponentid()
        {
            var client = Utility.GetCoreServiceSettings();
            string result = "Item not found";
            string TargetFolderTcmId = @"/webdav/200%20Master%20Content%20(ENG)/Building%20Blocks/Content/"; // Put your folder's webdav url or tcm uri here
            string title = @"Component Title";// Put your component title here
           
            var productsXML =
              client.GetListXml(TargetFolderTcmId,
              new OrganizationalItemItemsFilterData
              {
                  ItemTypes = new[] { ItemType.Component }
              });
 
            //loop through each item and find out if it is the product we want already exist
            foreach (var product in productsXML.Elements())
                {
                    tcmID = product.Attribute("ID").Value;
                    var productData = client.Read(product.Attribute("ID").Value, null) as ComponentData;
 
                    var schemaFields = client.ReadSchemaFields(productData.Schema.IdRef, false, null);
                    XNamespace ns = schemaFields.NamespaceUri;
 
                    //check if the product id's match
                    if ((XDocument.Parse(productData.Content)).Root.Element(ns + "heading") != null)
                    {
                        if (Id == (XDocument.Parse(productData.Content)).Root.Element(ns + "heading").Value)
                        {
                            return tcmID;
                        }
                    }
                }
                return String.Empty;
            }
            catch (Exception Ex)
            {
                return string.Empty;
            }
 
        }