Unable to cast object of type 'system.object[]' to type 'crmwcfservices.invreqclass[]'."}

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---------This is front end part ----

error //

Unable to cast object of type 'System.Object[]' to type 'CRMWCFSERVICES.InvReqClass[]'."}

Dim listReq As New List(Of InventoryRequest)

For Each Row As DataRow In ds.Tables(0).Rows
InvReq.REQUESTNUMBER = txtReqRefNo.Text
InvReq.PROJECTNAME = cmbProg.Text
InvReq.PARTNUMBER = Row("PartNo").ToString()
InvReq.EnggName = txtUserID.Text
InvReq.DEPTID = Session("DeptID")
InvReq.ITEMID = Row("ItemId").ToString
InvReq.QTY = txtRQty.Text
listReq.Add(InvReq)

'invClient.SendrequestToSL(InvReq.REQUESTNUMBER, InvReq.PROJECTNAME, InvReq.PARTNUMBER, InvReq.EnggName, InvReq.DEPTID, InvReq.ITEMID, InvReq.QTY)
Next

Dim arrList As New System.Collections.ArrayList(listReq)

// error is coming in last line
invClient.SendrequestToSL(arrList.ToArray())

--------------wcf servives ----------

        public string SendrequestToSL(List<InvReqClass> ListInvReqClass)
        {
            
        if (ListInvReqClass.Count == 0) { throw new ArgumentNullException("ListRequisitionRequest"); }
            var xmlElements = new XElement("ListRequisitionRequest",

                  from RequisitionRequest in ListInvReqClass

                  select new XElement("RequisitionRequest",
                            new XAttribute("ReqNoteNumber", RequisitionRequest.ReqNoteNumber),
                            new XElement("Qty", RequisitionRequest.Qty),
                            new XElement("ProgramName", RequisitionRequest.ProgramName),
                            new XElement("PartNo", RequisitionRequest.PartNo),
                            new XElement("ItemId", RequisitionRequest.ItemId),
                            new XElement("EnggName", RequisitionRequest.EnggName),
                            new XElement("DeptId", RequisitionRequest.DeptID)
                             ));
  return xmlElements.ToString();
        }

What I have tried:

<pre>---------This is front end part ----

  Dim listReq As New List(Of InventoryRequest)


        For Each Row As DataRow In ds.Tables(0).Rows
            InvReq.REQUESTNUMBER = txtReqRefNo.Text
            InvReq.PROJECTNAME = cmbProg.Text
            InvReq.PARTNUMBER = Row("PartNo").ToString()
            InvReq.EnggName = txtUserID.Text
            InvReq.DEPTID = Session("DeptID")
            InvReq.ITEMID = Row("ItemId").ToString
            InvReq.QTY = txtRQty.Text
            listReq.Add(InvReq)

            'invClient.SendrequestToSL(InvReq.REQUESTNUMBER, InvReq.PROJECTNAME, InvReq.PARTNUMBER, InvReq.EnggName, InvReq.DEPTID, InvReq.ITEMID, InvReq.QTY)
        Next

        
        Dim arrList As New System.Collections.ArrayList(listReq)

// error is coming in last line
        invClient.SendrequestToSL(arrList.ToArray())


--------------wcf servives ----------


<pre>
        public string SendrequestToSL(List<InvReqClass> ListInvReqClass)
        {
            
        if (ListInvReqClass.Count == 0) { throw new ArgumentNullException("ListRequisitionRequest"); }
            var xmlElements = new XElement("ListRequisitionRequest",

                  from RequisitionRequest in ListInvReqClass

                  select new XElement("RequisitionRequest",
                            new XAttribute("ReqNoteNumber", RequisitionRequest.ReqNoteNumber),
                            new XElement("Qty", RequisitionRequest.Qty),
                            new XElement("ProgramName", RequisitionRequest.ProgramName),
                            new XElement("PartNo", RequisitionRequest.PartNo),
                            new XElement("ItemId", RequisitionRequest.ItemId),
                            new XElement("EnggName", RequisitionRequest.EnggName),
                            new XElement("DeptId", RequisitionRequest.DeptID)
                             ));
  return xmlElements.ToString();
        }

Posted 4-Jul-19 23:27pm

Member 10194266

Updated 4-Jul-19 23:39pm

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F-ES Sitecore 5-Jul-19 5:31am

What line does the error happen on?

Member 10194266 5-Jul-19 9:59am

in below code

invClient.SendrequestToSL(arrList.ToArray())

1 solution

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Richard MacCutchan · Answer 1 · 2019-07-04T23:39:00

Solution 1

C#

        public string SendrequestToSL(List<InvReqClass> ListInvReqClass)

// ...


        Dim arrList As New System.Collections.ArrayList(listReq)
        invClient.SendrequestToSL(arrList.ToArray())

The SendrequestToSL method clearly requires a parameter of type List<InvReqClass>, but you are passing a simple array.

Posted 4-Jul-19 23:39pm

Richard MacCutchan

Comments

Member 10194266 5-Jul-19 10:01am

Hi Richard ,

Can you write a code which code i should used

Richard MacCutchan 5-Jul-19 15:15pm

Seriously, all you need to do is to pass the correct list type as defined by the method signature.