custom fieldtype not saving

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Adam Prendergast 33 posts 77 karma points MVP c-trib

Mar 09, 2012 @ 09:41
0

Custom FieldType not saving
I have created a custom field tyep which is the same as the standard 'textfield' just with a different name. I have done this to target specific text fields with css.

The form fails to save when the custom FieldType is implented.
```
public class MonetaryTextField : FieldType
  {
    public List<object> Value;
    public MonetaryTextField()
    {
      Id = new Guid("57ADD3AB-C3CD-464D-BCC2-3D1C05D3BF65");
      Name = "Monetary Text Field";
      Description = "Adds monetary formating to the form field";
      Icon = "textfield.png";
      DataType = FieldDataType.String;
      Value = new List<object>();
    }
    public override string RenderPreview()
    {
      return "<input type=\"text\" />";
    }
    public override string RenderPreviewWithPrevalues(List<object> prevalues)
    {
      return RenderPreview();
    }
    public override WebControl Editor
    {
      get
      {
        System.Web.UI.WebControls.TextBox tb = new System.Web.UI.WebControls.TextBox();
        tb.TextMode = System.Web.UI.WebControls.TextBoxMode.SingleLine;
        tb.CssClass = "monetary-field";
        return tb;
      }
      set
      {
        base.Editor = value;
      }
    }
  }
```
On submit I am getting:

Object reference not set to an instance of an object.

[NullReferenceException: Object reference not set to an instance of an object.]

Umbraco.Forms.Data.Storage.RecordFieldValueStorage.InsertRecordFieldValues(RecordField rf) +677

Umbraco.Forms.Data.Storage.RecordFieldStorage.InsertRecordField(RecordField recordfield) +1196

Umbraco.Forms.Data.Storage.RecordStorage.InsertRecord(Record record, Form form) +1865

Umbraco.Forms.Core.Services.RecordService.() +205

Umbraco.Forms.Core.Services.RecordService.Submit() +39

Umbraco.Forms.Core.Services.RecordService.NextPage() +169

Umbraco.Forms.UI.Usercontrols.RenderForm.nextPage(Object sender, EventArgs e) +241

System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +153

System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3706

What am I doing wrong? Any help would be appreciated.
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Adam Prendergast 33 posts 77 karma points MVP c-trib

Mar 09, 2012 @ 15:11

This is my fault for not reading the Developer Docs correctly the two correct method overrides are:

public override WebControl Editor
    {
      get
      {
        tb.TextMode = System.Web.UI.WebControls.TextBoxMode.SingleLine;
        tb.CssClass = "text monetary-field";

        if (_value.Count > 0)
          tb.Text = _value[0].ToString();

        return tb;
      }
      set
      {
        base.Editor = value;
      }
    }

    public override List<Object> Values
    {
      get
      {
        if (tb.Text != "")
        {
          _value.Clear();
          _value.Add(tb.Text);
        }
        return _value;
      }
      set
      {
        _value = value;
      }
    }

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Custom FieldType not saving