How do I get casenumberstextbox populated when getcasesbutton button is clicked?

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C#

I need help from the community. I have a CaseNumbersTextBox that I want to populate with a case/s number when button GetCasesButton is clicked.

The code I have is from a different desktop windows application. My application is a web app.

The old code uses ComboboxItem from RequestorComboBox. Here is what is happening in old app. A user selects a name from RequestorComboBox, then enters a court case number/s into the CaseNumbersTextBox. Then user clicks on GetCasesButton. The app looks for the case number entered from a database table. If the case number is not found an error message is displayed to the user as a popup.

I need to change RequestorComboBox to use RequestorDropDownList.

How do I do this?

What I have tried:

Here is the code that I need to make changes to so that instead of RequestorComboBox, I use RequestorDropDownList.

private async void GetCasesButton_Click(object sender, EventArgs e)
{
   #region Required Field Validation
    if (CaseNumbersTextBox.Text.Length < 1)
    {
        MessageBox.Show("Casenumber textbox cannot be empty.", "Search Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
        return;
    }
    ComboboxItem requestorItem = new ComboboxItem();
    requestorItem = (ComboboxItem)RequestorComboBox.SelectedItem;

    ComboboxItem reasonItem = new ComboboxItem();
    reasonItem = (ComboboxItem)ReasonComboBox.SelectedItem;

    if (requestorItem.Value < 1)
    {
        MessageBox.Show("Please select a Requestor.", "Search Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
        return;
    }

    if (reasonItem.Value < 1)
    {
        MessageBox.Show("Please select a Reason.", "Search Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
        return;
    }
    #endregion

    #region Parse case number entries
    string userEnteredCaseNumbers = CaseNumbersTextBox.Text;

    userEnteredCaseNumbers = userEnteredCaseNumbers.Replace("\r", ",");
    userEnteredCaseNumbers = userEnteredCaseNumbers.Replace("\n", ",");
    while (userEnteredCaseNumbers.Contains(",,"))
        userEnteredCaseNumbers = userEnteredCaseNumbers.Replace(",,", ",");

    List<string> userEnteredCaseNumberList = new List<string>();
    userEnteredCaseNumberList = userEnteredCaseNumbers.Split(',').Where(x => x.Length > 0).ToList();
    userEnteredCaseNumberList = userEnteredCaseNumberList.Select(s => s.Trim()).ToList();
    #endregion

    try
    {
        #region Get Batch Number
        int newBatchNumber = await CandidateCaseController.GetNextBatchNumber();
        #endregion

        #region Insert entered case numbers in database
        foreach (string caseNumber in userEnteredCaseNumberList)
        {
            EditCandidateCaseModel newCandidate = new EditCandidateCaseModel();
            newCandidate.CaseNbr = caseNumber;
            newCandidate.RequestorInfoID = requestorItem.Value;
            newCandidate.ReasonID = reasonItem.Value;
            newCandidate.BatchNumber = newBatchNumber;
            newCandidate.EntryStaffUserName = this._loggedInUserName;

            await CandidateCaseController.PostCandidate(newCandidate);
        }
        #endregion

        #region Get everything in Candidate table now that the new search has been entered
        List<GetCandidateCaseModel> candidateList = await CandidateCaseController.GetAllCandidates();
        candidateList = candidateList.Where(x => x.BatchNumber == newBatchNumber).ToList();

        string candidateCasesString = string.Empty;
        Regex rgxDash = new Regex("[^a-zA-Z0-9 ,]");

        candidateCasesString = string.Join(",", candidateList.Select(p => p.CaseNbr.ToString()));
        candidateCasesString = rgxDash.Replace(candidateCasesString, "").ToString();
        #endregion

        #region Get info on cases
        //candidateCasesString
        List<string> smallEnoughStrings = new List<string>();

        while (candidateCasesString.Length > 0)
        {
            int sendLength = 200;
            bool isLastString = false;

            if (candidateCasesString.Length < sendLength)
            {
                sendLength = candidateCasesString.Length;
                isLastString = true;
            }

            string smallChunk = candidateCasesString.Substring(0, sendLength);

            if (!isLastString)
            {
                int lastComma = smallChunk.LastIndexOf(',');
                smallChunk = smallChunk.Substring(0, lastComma);

                candidateCasesString = candidateCasesString.Remove(0, lastComma);
                if (candidateCasesString[0] == ',')
                    candidateCasesString = candidateCasesString.Remove(0, 1);
            }
            else
                candidateCasesString = candidateCasesString.Remove(0, sendLength);

            smallEnoughStrings.Add(smallChunk);
        }

        List<AcceptCaseNumbersModel> mncisDetailList = new List<AcceptCaseNumbersModel>();
        List<AcceptCaseNumbersModel> smallEnoughMncisDetailList = new List<AcceptCaseNumbersModel>();
        foreach (string smallEnoughString in smallEnoughStrings)
        {
            smallEnoughMncisDetailList = await FTACaseReset.Controllers.JusticeController.GetAllAcceptCaseNumbers(smallEnoughString);
            mncisDetailList.AddRange(smallEnoughMncisDetailList);
        }
        #endregion

        #region Parse data from MNCIS and add it to Candidate table
        //use candidateList to pull records out of mncisDetailList then update CandidateCase table
        foreach (GetCandidateCaseModel candidateCase in candidateList)
        {
            string caseNbrWODash = rgxDash.Replace(candidateCase.CaseNbr, "").ToString();
            AcceptCaseNumbersModel mncisDetail = mncisDetailList.Where(x => x.CaseNbrSrch.ToLower() == caseNbrWODash.ToLower()).FirstOrDefault();

            if (mncisDetail != null)
            {
                //if it found a record then edit Candidate details with case data
                candidateCase.FirstPenalty = mncisDetail.FirstPenaltyFlag == 1 ? true : false;
                candidateCase.SecondPenalty = mncisDetail.SecondPenaltyFlag == 1 ? true : false;

                if (candidateCase.CaseNbr.ToLower().Contains("vb") == false)
                    candidateCase.RejectionReason = await FTACaseReset.Controllers.RejectionController.GetRejectionByDescription(Enumerations.Rejections.No_Records_To_Reset.ToString().Replace("_", " "));
                else if (candidateCase.FirstPenalty == false && candidateCase.SecondPenalty == false)
                    candidateCase.RejectionReason = await FTACaseReset.Controllers.RejectionController.GetRejectionByDescription(Enumerations.Rejections.No_Records_To_Reset.ToString().Replace("_", " "));

                if (candidateCase.RejectionReason == null)
                    candidateCase.RejectionReason = await FTACaseReset.Controllers.RejectionController.GetRejectionByDescription(Enumerations.Rejections.Valid.ToString());
                candidateCase.Title = mncisDetail.Style;

                await FTACaseReset.Controllers.CandidateCaseController.PutCandidate(candidateCase);
            }
            else
            {
                //if it didn't find a record then change the rejection code on the Candidate
                candidateCase.RejectionReason = await FTACaseReset.Controllers.RejectionController.GetRejectionByDescription(Enumerations.Rejections.Invalid_Case_Number.ToString().Replace("_", " "));
                await FTACaseReset.Controllers.CandidateCaseController.PutCandidate(candidateCase);
            }
        }
        #endregion

        this.ClearForm();

        #region Populate Results
        ValidTabPage.Controls.Clear();
        InvalidTabPage.Controls.Clear();
        DiscardedTabPage.Controls.Clear();

        ValidTabPage.Text = "Valid Cases";
        InvalidTabPage.Text = "Invalid Cases";
        DiscardedTabPage.Text = "Discarded Cases";

        #region Repopulate Batch ComboBox
        this.PopulateBatchComboBox();
        #endregion

        List<GetCandidateCaseModel> thisBatchCasesList = new List<GetCandidateCaseModel>();
        thisBatchCasesList = await Controllers.CandidateCaseController.GetCandidateByBatchID(newBatchNumber);

        if (thisBatchCasesList.Count > 0)
            this.EmailButton.Enabled = true;
        else
        {
            this.EmailButton.Enabled = false;
            return;
        }

        this.PopulateTabs(thisBatchCasesList, true);

        this.GetCasesPanel.Visible = false;
        this.UpdateExistingPanel.Visible = true;

        ComboboxItem batchItem = new ComboboxItem(thisBatchCasesList[0].BatchNumber);
        SelectBatch(batchItem);

        ComboboxItem requestorUpdateItem = new ComboboxItem(thisBatchCasesList[0].RequestorInfo);
        SelectRequestorUpdate(requestorUpdateItem);

        ComboboxItem reasonUpdateItem = new ComboboxItem(thisBatchCasesList[0].Reason);
        SelectReasonUpdate(reasonUpdateItem);

        #endregion

    }
    catch (Exception ex)
    {
        string errorMsg = string.Format("An error has occured in {0}. \nException:\n{1}", "GetCasesButton_Click()", ex.Message);
        ClientScript.RegisterStartupScript(this.GetType(), "myalert", "alert('" + errorMsg + "');", true);
    }
}