43 lines
1.7 KiB
C#
43 lines
1.7 KiB
C#
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using System.Collections.Generic;
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using System.Globalization;
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using System.Web.DynamicData.Util;
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using System.Web.Resources;
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using System.Web.UI;
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using System.Web.UI.WebControls;
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namespace System.Web.DynamicData {
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/// <summary>
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/// DynamicQueryStringParameter allows a datasource to have its primary key easily fed from the query string.
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/// It does not require any attributes, and works even for multi-part primary keys.
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/// </summary>
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public class DynamicQueryStringParameter : Parameter, IWhereParametersProvider {
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/// <summary>
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/// See IWhereParametersProvider.GetWhereParameters
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/// </summary>
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public virtual IEnumerable<Parameter> GetWhereParameters(IDynamicDataSource dataSource) {
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var table = MetaTableHelper.GetTableWithFullFallback(dataSource, HttpContext.Current.ToWrapper());
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// check makes no sense as the above call will throw
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//if (table == null) {
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// return new Parameter[0];
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//}
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return RouteParametersHelper.GetColumnParameters(table, Name);
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}
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/// <summary>
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/// same as base
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/// </summary>
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/// <param name="context"></param>
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/// <param name="control"></param>
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/// <returns></returns>
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protected override object Evaluate(HttpContext context, Control control) {
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// If this gets called, it means we never had a chance to expand the parameter. Give an error
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// telling the user to use a DynamicDataManager
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throw new InvalidOperationException(String.Format(
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CultureInfo.CurrentCulture, DynamicDataResources.DynamicParameter_NeedExpansion, typeof(DynamicQueryStringParameter).Name));
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}
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}
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}
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