DevExpress TextEdit的对象强制转换

 double zhi = Convert.ToDouble(textEdit39);
                for (int i = 0; i < this.gridView14.RowCount; i++)
                {
                    if (this.gridView14.IsRowSelected(i) == true)

                    {
                        //string s = gridView14.GetDataRow(i)["值"].ToString();
                         //this.gridView14.GetDataRow(i)["原始值"]=textEdit39.Text.Trim();//取选中行的ID字段的值
                        this.gridView14.GetDataRow(i)["值"] = zhi;
                      
                    }
                }

提示错误
System.InvalidCastException:“无法将类型为“DevExpress.XtraEditors.TextEdit”的对象强制转换为类型“System.IConvertible”。”

你应该是要转值吧，Convert.ToDouble(textEdit39.Text) 或者 Convert.ToDouble(textEdit39.EditValue)