Hello Daniel,

I can suggest you using RowTemplate for the purpose.

You can use input field for the editable columns (ModifiedDate and List Price)

<td data-key='${ModifiedDate}'><input value ='${ModifiedDate}'/></td>

<td data-key='${ListPrice}'><input value ='${ListPrice}'/></td>

Please take a look at the code snippet below.

<%= Html.Infragistics().Grid(Model).ID("grid2").Height("500px").PrimaryKey("ProductID")

        .AutoCommit(false)   
        .Columns(column =>
        {
            column.For(x => x.ProductID).Width("150px");
            column.For(x => x.Name).Width("200px");
            column.For(x => x.ModifiedDate).Width("200px");
            column.For(x => x.ListPrice).Width("150px");
            }).Features(features => {
                features.Sorting();
                features.Updating();
            })
           .GenerateCompactJSONResponse(false)
.RowTemplate("<tr><td> ${ProductID} </td><td class='editableField'>${Name}</td><td data-key='${ModifiedDate}'><input value ='${ModifiedDate}'/></td><td data-key='${ListPrice}'><input value ='${ListPrice}'/></td> </tr>")
            .DataSourceUrl(Url.Action("EditingGetData"))
            .UpdateUrl("EditingSaveChanges")
            .DataBind()
            .Render() %>

Let us know if you need further assistance.