FormatValue() public method

public FormatValue ( object value, string format ) : string
value object
format string
return string
Esempio n. 1
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        // Helper methods
        #region Common Helpers
        private static MvcHtmlString InputHelper(HtmlHelper htmlHelper, InputType inputType, ModelMetadata metadata, string name, object value, bool useViewData, bool isChecked, bool setId, bool isExplicitValue, string format, IDictionary <string, object> htmlAttributes)
        {
            //string fullName = htmlHelper.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName(name);
            string fullName = name;

            if (String.IsNullOrEmpty(fullName))
            {
                throw new ArgumentException(MvcResources.Common_NullOrEmpty, "name");
            }

            TagBuilder tagBuilder = new TagBuilder("input");

            tagBuilder.MergeAttributes(htmlAttributes);
            tagBuilder.MergeAttribute("type", HtmlHelper.GetInputTypeString(inputType));
            tagBuilder.MergeAttribute("name", fullName, true);

            string valueParameter = htmlHelper.FormatValue(value, format);
            bool   usedModelState = false;

            switch (inputType)
            {
            case InputType.CheckBox:
                bool?modelStateWasChecked = htmlHelper.GetModelStateValue(fullName, typeof(bool)) as bool?;
                if (modelStateWasChecked.HasValue)
                {
                    isChecked      = modelStateWasChecked.Value;
                    usedModelState = true;
                }
                goto case InputType.Radio;

            case InputType.Radio:
                if (!usedModelState)
                {
                    string modelStateValue = htmlHelper.GetModelStateValue(fullName, typeof(string)) as string;
                    if (modelStateValue != null)
                    {
                        isChecked      = String.Equals(modelStateValue, valueParameter, StringComparison.Ordinal);
                        usedModelState = true;
                    }
                }
                if (!usedModelState && useViewData)
                {
                    isChecked = htmlHelper.EvalBoolean(fullName);
                }
                if (isChecked)
                {
                    tagBuilder.MergeAttribute("checked", "checked");
                }
                tagBuilder.MergeAttribute("value", valueParameter, isExplicitValue);
                break;

            case InputType.Password:
                if (value != null)
                {
                    tagBuilder.MergeAttribute("value", valueParameter, isExplicitValue);
                }
                break;

            default:
                string attemptedValue = (string)htmlHelper.GetModelStateValue(fullName, typeof(string));
                tagBuilder.MergeAttribute("value", attemptedValue ?? ((useViewData) ? htmlHelper.EvalString(fullName, format) : valueParameter), isExplicitValue);
                break;
            }

            if (setId)
            {
                tagBuilder.GenerateId(fullName);
            }

            // If there are any errors for a named field, we add the css attribute.
            if (htmlHelper.HasFieldError(fullName))
            {
                tagBuilder.AddCssClass(HtmlHelper.ValidationInputCssClassName);
            }

            tagBuilder.MergeAttributes(htmlHelper.GetUnobtrusiveValidationAttributes(name, metadata));

            //causes 'true,false' to be posted which is an invalid value for booleans
            if (false && inputType == InputType.CheckBox)
            {
                // Render an additional <input type="hidden".../> for checkboxes. This
                // addresses scenarios where unchecked checkboxes are not sent in the request.
                // Sending a hidden input makes it possible to know that the checkbox was present
                // on the page when the request was submitted.
                StringBuilder inputItemBuilder = new StringBuilder();
                inputItemBuilder.Append(tagBuilder.ToString(TagRenderMode.SelfClosing));

                TagBuilder hiddenInput = new TagBuilder("input");
                hiddenInput.MergeAttribute("type", HtmlHelper.GetInputTypeString(InputType.Hidden));
                hiddenInput.MergeAttribute("name", fullName);
                hiddenInput.MergeAttribute("value", "false");
                inputItemBuilder.Append(hiddenInput.ToString(TagRenderMode.SelfClosing));
                return(MvcHtmlString.Create(inputItemBuilder.ToString()));
            }

            return(tagBuilder.ToHtmlString(TagRenderMode.SelfClosing));
        }
        // Helper methods
        #region Common Helpers
        private static MvcHtmlString InputHelper(HtmlHelper htmlHelper, InputType inputType, ModelMetadata metadata, string name, object value, bool useViewData, bool isChecked, bool setId, bool isExplicitValue, string format, IDictionary <string, object> htmlAttributes)
        {
            //string fullName = htmlHelper.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName(name);
            string fullName = name;

            if (String.IsNullOrEmpty(fullName))
            {
                throw new ArgumentException(MvcResources.Common_NullOrEmpty, "name");
            }

            TagBuilder tagBuilder = new TagBuilder("input");

            tagBuilder.MergeAttributes(htmlAttributes);
            tagBuilder.MergeAttribute("type", HtmlHelper.GetInputTypeString(inputType));
            tagBuilder.MergeAttribute("name", fullName, true);

            string valueParameter = htmlHelper.FormatValue(value, format);
            bool   usedModelState = false;

            switch (inputType)
            {
            case InputType.CheckBox:
                bool?modelStateWasChecked = htmlHelper.GetModelStateValue(fullName, typeof(bool)) as bool?;
                if (modelStateWasChecked.HasValue)
                {
                    isChecked      = modelStateWasChecked.Value;
                    usedModelState = true;
                }
                goto case InputType.Radio;

            case InputType.Radio:
                if (!usedModelState)
                {
                    string modelStateValue = htmlHelper.GetModelStateValue(fullName, typeof(string)) as string;
                    if (modelStateValue != null)
                    {
                        isChecked      = String.Equals(modelStateValue, valueParameter, StringComparison.Ordinal);
                        usedModelState = true;
                    }
                }
                if (!usedModelState && useViewData)
                {
                    isChecked = htmlHelper.EvalBoolean(fullName);
                }
                if (isChecked)
                {
                    tagBuilder.MergeAttribute("checked", "checked");
                }
                tagBuilder.MergeAttribute("value", valueParameter, isExplicitValue);
                break;

            case InputType.Password:
                if (value != null)
                {
                    tagBuilder.MergeAttribute("value", valueParameter, isExplicitValue);
                }
                break;

            default:
                string attemptedValue = (string)htmlHelper.GetModelStateValue(fullName, typeof(string));
                tagBuilder.MergeAttribute("value", attemptedValue ?? ((useViewData) ? htmlHelper.EvalString(fullName, format) : valueParameter), isExplicitValue);
                break;
            }

            if (setId)
            {
                tagBuilder.GenerateId(fullName);
            }

            // If there are any errors for a named field, we add the css attribute.
            if (htmlHelper.HasFieldError(fullName))
            {
                tagBuilder.AddCssClass(HtmlHelper.ValidationInputCssClassName);
            }

            tagBuilder.MergeAttributes(htmlHelper.GetUnobtrusiveValidationAttributes(name, metadata));

            return(tagBuilder.ToHtmlString(TagRenderMode.SelfClosing));
        }