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using System.Collections.Generic;
using System.Collections.Specialized;
using System.Globalization;
using System.Text;
using System.Web.Resources;
namespace System.Web.DynamicData {
internal static class QueryStringHandler {
public static string AddFiltersToPath(string virtualPath, IDictionary<string, object> filters) {
if (String.IsNullOrEmpty(virtualPath))
throw new ArgumentException(
String.Format(CultureInfo.CurrentCulture, DynamicDataResources.QueryStringHandler_VirtualPathCannotBeEmpty),
"virtualPath");
if (filters == null)
throw new ArgumentNullException("filters");
string queryString = ConcatenateQueryStringElements(filters);
if (String.IsNullOrEmpty(queryString))
return virtualPath;
StringBuilder result = new StringBuilder(virtualPath);
if (!virtualPath.Contains("?")) {
result.Append('?');
}
else {
if (!virtualPath.EndsWith("?", StringComparison.Ordinal) && !virtualPath.EndsWith("&", StringComparison.Ordinal)) {
result.Append('&');
}
}
result.Append(queryString);
return result.ToString();
}
private static string ConcatenateQueryStringElements(IDictionary<string, object> parameters) {
if (parameters.Count == 0) {
return String.Empty;
}
StringBuilder result = new StringBuilder();
bool firstParam = true;
foreach (String s in parameters.Keys) {
if (!String.IsNullOrEmpty(s)) {
string key = SanitizeParameterComponent(s);
string value = SanitizeParameterComponent(parameters[s]);
if (firstParam)
firstParam = false;
else
result.Append('&');
result.Append(key);
result.Append('=');
result.Append(value);
}
}
return result.ToString();
}
private static string SanitizeParameterComponent(object value) {
if (value == null)
return String.Empty;
string strValue = value.ToString();
// Trim trailing spaces, as they are typically meaningless, and make the url look ugly
strValue = strValue.TrimEnd();
return Uri.EscapeDataString(strValue);
}
}
}
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