Name cannot begin with the '\"' character, hexadecimal value 0x22

Question

I am trying to create Calculated Column in SharePoint Document Library using Client Object Model.
However getting following error while executing FieldSchema:
Name cannot begin with the '\"' character, hexadecimal value 0x22
Code:
 var calculated = "Calculated";
 var displayName = "Effective Date";
 var internalName = "Effective Date";
 var formula = "=IF(ISBLANK(Col_DocumentEffectiveDate),\"\",TEXT(Col_DocumentEffectiveDate,\"DD-Mmm-YYYY\"))";
 List lib = clientContext.Web.Lists.GetByTitle(docLibName);
 clientContext.Load(lib);
 clientContext.ExecuteQuery();
string fieldSchema = "<Field Type=\"" + calculated + "\" DisplayName=\"" + displayName + "\" Name=\"" +internalName+ "\" Formula=\"" + formula + "\"
/>";
lib.Fields.AddFieldAsXml(fieldSchema, true, AddFieldOptions.AddFieldInternalNameHint);
clientContext.ExecuteQuery();
Code does't work if i replace quotation marks("\) in Formula with "&quot;"
Could someone help with issue?

Answer 1

Hi,
I suggest you take the code below which works in my environment to do the test again:
ClientContext clientContext = new ClientContext("http://sp/");
List list = clientContext.Web.Lists.GetByTitle("List2");
FieldCollection fields = list.Fields;
clientContext.Load(fields);
clientContext.ExecuteQuery();
var displayName = "Cal2";
var formula = "=IF(ISBLANK([Created]), \"\" , TEXT([Created], \"DD-Mmm-YYYY\"))";
var fieldSchema = "<Field Type='Calculated' DisplayName='" + displayName + "' ResultType='Text'><Formula>" + formula + "</Formula></Field>";
fields.AddFieldAsXml(fieldSchema, true, AddFieldOptions.DefaultValue);
clientContext.ExecuteQuery();
Feel free to reply if the issue still exists.
Best regards
Patrick Liang
TechNet Community Support