Unable to add column between two columns using Google spreadsheet Api - google-sheets-api

Question

I have a Google spreadsheet. On my E column, I want to add recent month with the year (eg: Sept 2017) if not available on E column.Suppose there is (Aug 2017) and now when I add (Sept 2017) it adds but it replaces the existing column that is Aug 2107. My requirement is to keep both: newly added (Sept 2017) and (Aug 2017).
I want recent month on E column and shift existing column on the right that is F column. I'm doing this using C#.
static void Main(string[] args)
{
HttpClient client = new HttpClient();
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
try
{
var service = new SheetsService(new BaseClientService.Initializer()
{
HttpClientInitializer = GetCredential(),
ApplicationName = ApplicationName,
});
String spreadsheetId = "1lZnvQe6lTGG81hyuQvf7HjH8YpnIadFlNHjFUq_G-5Q";
String range = "E1";
SpreadsheetsResource.ValuesResource.GetRequest getRequest = service.Spreadsheets.Values.Get(spreadsheetId, range);
Data.ValueRange response = getRequest.Execute();
string recentMonth = DateTime.Now.ToString("MMM yyyy");
var recentMonthArrayValue = new List<string[]>();
recentMonthArrayValue.Add(new string[] { recentMonth });
if (response.Values[0][0].ToString() != recentMonth)
{
DateTime now = DateTime.Now;
var currentMonthStartDate = new DateTime(now.Year, now.Month, 1).ToShortDateString();
Data.BatchUpdateSpreadsheetRequest batchUpdateSpreadsheetRequest = new Data.BatchUpdateSpreadsheetRequest();
batchUpdateSpreadsheetRequest.Requests = new List<Data.Request>();
Data.Request request = new Data.Request();
batchUpdateSpreadsheetRequest.Requests.Add(request);
request.UpdateCells = new Data.UpdateCellsRequest();
var gridCoordinate = new Data.GridCoordinate();
gridCoordinate.ColumnIndex = 5;
gridCoordinate.SheetId = 0;
request.UpdateCells.Start = gridCoordinate;
request.UpdateCells.Fields = "*";
request.UpdateCells.Rows = new List<Data.RowData>();
var rowData = new Data.RowData();
request.UpdateCells.Rows.Add(rowData);
rowData.Values = new List<Data.CellData>();
var cellData = new Data.CellData();
cellData.UserEnteredValue = new Data.ExtendedValue();
cellData.UserEnteredValue.FormulaValue = "=TEXT(\"" + currentMonthStartDate + "\",\"MMM yyyy\")";
rowData.Values.Add(cellData);
SpreadsheetsResource.BatchUpdateRequest batchUpdateRequest = service.Spreadsheets.BatchUpdate(batchUpdateSpreadsheetRequest, spreadsheetId);
batchUpdateRequest.Execute();
}
}
catch (Exception e)
{
//throw;
}
}
public static UserCredential GetCredential()
{
UserCredential credential;
using (var stream =new FileStream("client_secret.json", FileMode.Open, FileAccess.Read))
{
string credPath = System.Environment.GetFolderPath(
System.Environment.SpecialFolder.Personal);
credPath = Path.Combine(credPath, ".credentials/sheets.googleapis.com-dotnet-quickstart.json");
credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
GoogleClientSecrets.Load(stream).Secrets,
Scopes,
"user",
CancellationToken.None,
new FileDataStore(credPath, true)).Result;
return credential;
}
}

Answer 1

Check the insert an empty row or column guide in Sheets API:
The following spreadsheets.batchUpdate request inserts two blank
columns at column C. A second request inserts three empty rows at row
1. The inheritBefore field, if true, tells the API to give the new columns or rows the same properties as the prior row or column;
otherwise the new columns or rows acquire the properties of those that
follow them. inheritBefore cannot be true if inserting a row at row 1
or a column at column A.
The request protocol is shown below. The Updating Spreadsheets guide
shows how to implement a batch update in different languages using the
Google API client libraries.
POST https://sheets.googleapis.com/v4/spreadsheets/spreadsheetId:batchUpdate
{
"requests": [
{
"insertDimension": {
"range": {
"sheetId": sheetId,
"dimension": "COLUMNS",
"startIndex": 2,
"endIndex": 4
},
"inheritBefore": true
}
},
{
"insertDimension": {
"range": {
"sheetId": sheetId,
"dimension": "ROWS",
"startIndex": 0,
"endIndex": 3
},
"inheritBefore": false
}
},
],
}