I have changed the Filters Boolean.ascx.cs code slightly as per the bold highlighted code below because I wanted the Systems page to display only the System's names that have the Active column in the database set to true. (Active - boolean - True / False
in the database).
This seems to be working but if I have another 3 entities with other boolen columns I will have to investigate all of them with "Ifs"
Is there a better way of deciding the default selected values for the filters (Dropdowns)?
Cheers
CP
protected void Page_Init(object sender, EventArgs e)
{
if (!Column.ColumnType.Equals(typeof(bool)))
{
throw new InvalidOperationException(String.Format("A boolean filter was loaded for column '{0}' but the column has an incompatible type '{1}'.", Column.Name, Column.ColumnType));
}
if (!Page.IsPostBack)
{
DropDownList1.Items.Add(new ListItem("All", String.Empty));
if (!Column.IsRequired)
{
DropDownList1.Items.Add(new ListItem("[Not Set]", NullValueString));
}
DropDownList1.Items.Add(new ListItem("True", Boolean.TrueString));
DropDownList1.Items.Add(new ListItem("False", Boolean.FalseString));
// Set the initial value if there is one
string initialValue = DefaultValue;
if (!String.IsNullOrEmpty(initialValue))
{
DropDownList1.SelectedValue = initialValue;
}
else { if (Column.Table.DisplayName == "Systems" && Column.Name == "Active") DropDownList1.SelectedValue = "True"; } }
}
Hi Pallone, I generally use a custom boolean filter like yours and then use FilterUIHint to set it and I also pass in a value in the control parameters collection
I have tried your code but got this error here: Column.GetAttribute<FilterUIHintAttribute>();
Error 3 'System.Web.DynamicData.MetaColumn' does not contain a definition for 'GetAttribute' and no extension method 'GetAttribute' accepting a first argument of type 'System.Web.DynamicData.MetaColumn' could be found (are you missing a using directive or
an assembly reference?) C:\Dev\BBLDSAccessManager\BBLDSAccessManager\DynamicData\Filters\Boolean.ascx.cs 45 43 BBLDSAccessManager
I have tried changing the code to this:
var filterUIHint = Column.Attributes.OfType<FilterUIHintAttribute>();
Error 4 'System.Collections.Generic.IEnumerable<System.ComponentModel.DataAnnotations.FilterUIHintAttribute>'
does not contain a definition for 'ControlParameters' and no extension method 'ControlParameters' accepting a first argument of type
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web.DynamicData;
using System.ComponentModel;
using System.Collections;
namespace NotAClue.ComponentModel.DataAnnotations
{
public static class AttributeExtensionMethods
{
/// <summary>
/// Gets the control parameter.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="dictionary">The dictionary.</param>
/// <param name="key">The key.</param>
/// <returns></returns>
/// <remarks></remarks>
public static T GetControlParameter<T>(this IDictionary<String,object> dictionary, String key)
{
if (dictionary.Keys.Contains(key))
return (T)dictionary[key];
return default(T);
}
/// <summary>
/// Determines whether the specified descriptor has attribute.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="descriptor">The descriptor.</param>
/// <returns>
/// <c>true</c> if the specified descriptor has attribute; otherwise, <c>false</c>.
/// </returns>
public static Boolean HasAttribute<T>(this PropertyDescriptor descriptor) where T : Attribute
{
Boolean value = false;
for (int i = 0; i < descriptor.Attributes.Count && !value; i++)
{
value = (descriptor.Attributes[i] is T);
}
return value;
}
/// <summary>
/// Gets the attribute.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="descriptor">The descriptor.</param>
/// <returns></returns>
public static T GetAttribute<T>(this PropertyDescriptor descriptor) where T : Attribute
{
return descriptor.Attributes.OfType<T>().FirstOrDefault();
}
/// <summary>
/// Gets the attribute or default.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="attributes">The attributes.</param>
/// <returns></returns>
public static T GetAttributeOrDefault<T>(this AttributeCollection attributes) where T : Attribute, new()
{
return attributes.OfType<T>().DefaultIfEmpty(new T()).FirstOrDefault();
}
/// <summary>
/// Gets the attribute.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="attributes">The attributes.</param>
/// <returns></returns>
public static T GetAttribute<T>(this AttributeCollection attributes) where T : Attribute
{
return attributes.OfType<T>().FirstOrDefault();
}
/// <summary>
/// Get the attribute or a default instance of the attribute
/// if the Table attribute do not contain the attribute
/// </summary>
/// <typeparam name="T">Attribute type</typeparam>
/// <param name="table">
/// Table to search for the attribute on.
/// </param>
/// <returns>
/// The found attribute or a default
/// instance of the attribute of type T
/// </returns>
public static T GetAttributeOrDefault<T>(this MetaTable table) where T : Attribute, new()
{
return table.Attributes.OfType<T>().DefaultIfEmpty(new T()).FirstOrDefault();
}
/// <summary>
/// Get the attribute of type T or null if not found
/// </summary>
/// <typeparam name="T">
/// Attribute type
/// </typeparam>
/// <param name="table">
/// Table to search for the attribute on.
/// </param>
/// <returns>
/// Returns the attribute T or null
/// </returns>
public static T GetAttribute<T>(this MetaTable table) where T : Attribute
{
return table.Attributes.OfType<T>().FirstOrDefault();
}
/// <summary>
/// Get the attribute or a default instance of the attribute
/// if the Column attribute do not contain the attribute
/// </summary>
/// <typeparam name="T">
/// Attribute type
/// </typeparam>
/// <param name="table">
/// Column to search for the attribute on.
/// </param>
/// <returns>
/// The found attribute or a default
/// instance of the attribute of type T
/// </returns>
public static T GetAttributeOrDefault<T>(this MetaColumn column) where T : Attribute, new()
{
return column.Attributes.OfType<T>().DefaultIfEmpty(new T()).FirstOrDefault();
}
/// <summary>
/// Get the attribute of type T or null if not found
/// </summary>
/// <typeparam name="T">Attribute type</typeparam>
/// <param name="table">Column to search for the attribute on.</param>
/// <returns>Returns the attribute T or null</returns>
public static T GetAttribute<T>(this MetaColumn column) where T : Attribute
{
return column.Attributes.OfType<T>().FirstOrDefault();
}
/// <summary>
/// Gets the attribute or default.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="column">The column.</param>
/// <returns></returns>
public static T GetAttributeOrDefault<T>(this MetaChildrenColumn column) where T : Attribute, new()
{
return column.Attributes.OfType<T>().DefaultIfEmpty(new T()).FirstOrDefault();
}
/// <summary>
/// Gets the attribute.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="column">The column.</param>
/// <returns></returns>
public static T GetAttribute<T>(this MetaChildrenColumn column) where T : Attribute
{
return column.Attributes.OfType<T>().FirstOrDefault();
}
}
}
the FilterUIHint is build in to ASP.Net 4 onwards.
See my blog C# Bits | Twitter @sjnaughton Always seeking an elegant solution.
Hi Pallone, copy the default Boolean filter and rename the update the Page_Init method like so:
protected void Page_Init(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
if (!Column.IsRequired)
DropDownList1.Items.Add(new ListItem("[Not Set]", NullValueString));
PopulateListControl(DropDownList1);
// Set the initial value if there is one
string initialValue = DefaultValue;
var filterUIHint = Column.GetAttribute<FilterUIHintAttribute>();
if (filterUIHint != null && filterUIHint.ControlParameters.ContainsKey("Value"))
initialValue = filterUIHint.ControlParameters["Value"].ToString();
if (!String.IsNullOrEmpty(initialValue))
DropDownList1.SelectedValue = initialValue;
}
}
remember to renme the inherits attribute in the control directive in the mark-up
I am having problems with your DataAnnotation class as follows:
Error 4 The type or namespace name 'RequiredWhenVisibleAttribute' could not be found (are you missing a using directive or an assembly reference?) C:\Dev\BBLDSAccessManager\BBLDSAccessManager\DAL\DataAnnotations.cs 32 48 BBLDSAccessManager
and
Error 5 'AttributeCollection' is an ambiguous reference between 'System.Web.UI.AttributeCollection' and 'System.ComponentModel.AttributeCollection' C:\Dev\BBLDSAccessManager\BBLDSAccessManager\DAL\DataAnnotations.cs 72 55 BBLDSAccessManager
Please can you let me know what I have to do to fix it?
1 - I am also having problems when I call the GetAttribute() method:
var filterUIHint = Column.GetAttribute<FilterUIHintAttribute>();
Error 3 The call is ambiguous between the following methods or properties: 'BBLDSAccessManager.DAL.DynamicDataExtensionMethods.GetAttribute<System.ComponentModel.DataAnnotations.FilterUIHintAttribute>(System.Web.DynamicData.MetaColumn)' and 'BBLDSAccessManager.DAL.AttributeExtensionMethods.GetAttribute<System.ComponentModel.DataAnnotations.FilterUIHintAttribute>(System.Web.DynamicData.MetaColumn)' C:\Dev\BBLDSAccessManager\BBLDSAccessManager\DynamicData\Filters\DefaultValueBoolean.ascx.cs 57 36 BBLDSAccessManager
2 - I think that I am still not sure how to use the public staticclassAttributeExtensionMethods
Data Annotation class extension methods you provided in your post.
Where do I put the class so that my code in the DefaultValueBooleanFilter.asxc.cs can understand the GetAttribute() method?
I'll try again sorry about that. Hi Pallone, I didn't send a sample but did include all the required code in my previous posts, I will do a quick sample and e-mail it now :)
See my blog C# Bits | Twitter @sjnaughton Always seeking an elegant solution.
Member
18 Points
156 Posts
How to set the default selected value for the Filters dropdown boxes?
Oct 03, 2012 09:17 AM|pallone|LINK
Hi,
I have changed the Filters Boolean.ascx.cs code slightly as per the bold highlighted code below because I wanted the Systems page to display only the System's names that have the Active column in the database set to true. (Active - boolean - True / False in the database).
This seems to be working but if I have another 3 entities with other boolen columns I will have to investigate all of them with "Ifs"
Is there a better way of deciding the default selected values for the filters (Dropdowns)?
Cheers
CP
protected void Page_Init(object sender, EventArgs e) { if (!Column.ColumnType.Equals(typeof(bool))) { throw new InvalidOperationException(String.Format("A boolean filter was loaded for column '{0}' but the column has an incompatible type '{1}'.", Column.Name, Column.ColumnType)); } if (!Page.IsPostBack) { DropDownList1.Items.Add(new ListItem("All", String.Empty)); if (!Column.IsRequired) { DropDownList1.Items.Add(new ListItem("[Not Set]", NullValueString)); } DropDownList1.Items.Add(new ListItem("True", Boolean.TrueString)); DropDownList1.Items.Add(new ListItem("False", Boolean.FalseString)); // Set the initial value if there is one string initialValue = DefaultValue; if (!String.IsNullOrEmpty(initialValue)) { DropDownList1.SelectedValue = initialValue; } else { if (Column.Table.DisplayName == "Systems" && Column.Name == "Active") DropDownList1.SelectedValue = "True"; } } }asdfasdf
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Re: How to set the default selected value for the Filters dropdown boxes?
Oct 03, 2012 10:07 AM|sjnaughton|LINK
Hi Pallone, I generally use a custom boolean filter like yours and then use FilterUIHint to set it and I also pass in a value in the control parameters collection
Then I can test for the value from the control parameters
var filterUIHint = Column.GetAttribute<FilterUIHintAttribute>(); if (filterUIHint != null && filterUIHint.ControlParameters.ContainsKey("Value")) initialValue = filterUIHint.ControlParameters["Value"].ToString(); if (!String.IsNullOrEmpty(initialValue)) DropDownList1.SelectedValue = initialValue;How does that look.
Always seeking an elegant solution.
Member
18 Points
156 Posts
Re: How to set the default selected value for the Filters dropdown boxes?
Oct 03, 2012 11:56 AM|pallone|LINK
Hi Steve,
This is really great. Could you please provide the code for the attribute as well?
Cheers
Claudio
Member
18 Points
156 Posts
Re: How to set the default selected value for the Filters dropdown boxes?
Oct 03, 2012 12:22 PM|pallone|LINK
Hi Steve,
I have tried your code but got this error here: Column.GetAttribute<FilterUIHintAttribute>();
Error 3 'System.Web.DynamicData.MetaColumn' does not contain a definition for 'GetAttribute' and no extension method 'GetAttribute' accepting a first argument of type 'System.Web.DynamicData.MetaColumn' could be found (are you missing a using directive or an assembly reference?) C:\Dev\BBLDSAccessManager\BBLDSAccessManager\DynamicData\Filters\Boolean.ascx.cs 45 43 BBLDSAccessManager
I have tried changing the code to this:
var filterUIHint = Column.Attributes.OfType<FilterUIHintAttribute>();
But then it breaks the line below:
filterUIHint.ControlParameters.ContainsKey("Value"))
Error 4 'System.Collections.Generic.IEnumerable<System.ComponentModel.DataAnnotations.FilterUIHintAttribute>' does not contain a definition for 'ControlParameters' and no extension method 'ControlParameters' accepting a first argument of type
I have added this to my partial class
[FilterUIHint("DefaultValueBoolean", null, "Value", "True")]
public object Active;
Please can you shed some light?
Cheers
CP
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Re: How to set the default selected value for the Filters dropdown boxes?
Oct 04, 2012 04:57 AM|sjnaughton|LINK
Sorry the code for the GetAttribute is here
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Web.DynamicData; using System.ComponentModel; using System.Collections; namespace NotAClue.ComponentModel.DataAnnotations { public static class AttributeExtensionMethods { /// <summary> /// Gets the control parameter. /// </summary> /// <typeparam name="T"></typeparam> /// <param name="dictionary">The dictionary.</param> /// <param name="key">The key.</param> /// <returns></returns> /// <remarks></remarks> public static T GetControlParameter<T>(this IDictionary<String,object> dictionary, String key) { if (dictionary.Keys.Contains(key)) return (T)dictionary[key]; return default(T); } /// <summary> /// Determines whether the specified descriptor has attribute. /// </summary> /// <typeparam name="T"></typeparam> /// <param name="descriptor">The descriptor.</param> /// <returns> /// <c>true</c> if the specified descriptor has attribute; otherwise, <c>false</c>. /// </returns> public static Boolean HasAttribute<T>(this PropertyDescriptor descriptor) where T : Attribute { Boolean value = false; for (int i = 0; i < descriptor.Attributes.Count && !value; i++) { value = (descriptor.Attributes[i] is T); } return value; } /// <summary> /// Gets the attribute. /// </summary> /// <typeparam name="T"></typeparam> /// <param name="descriptor">The descriptor.</param> /// <returns></returns> public static T GetAttribute<T>(this PropertyDescriptor descriptor) where T : Attribute { return descriptor.Attributes.OfType<T>().FirstOrDefault(); } /// <summary> /// Gets the attribute or default. /// </summary> /// <typeparam name="T"></typeparam> /// <param name="attributes">The attributes.</param> /// <returns></returns> public static T GetAttributeOrDefault<T>(this AttributeCollection attributes) where T : Attribute, new() { return attributes.OfType<T>().DefaultIfEmpty(new T()).FirstOrDefault(); } /// <summary> /// Gets the attribute. /// </summary> /// <typeparam name="T"></typeparam> /// <param name="attributes">The attributes.</param> /// <returns></returns> public static T GetAttribute<T>(this AttributeCollection attributes) where T : Attribute { return attributes.OfType<T>().FirstOrDefault(); } /// <summary> /// Get the attribute or a default instance of the attribute /// if the Table attribute do not contain the attribute /// </summary> /// <typeparam name="T">Attribute type</typeparam> /// <param name="table"> /// Table to search for the attribute on. /// </param> /// <returns> /// The found attribute or a default /// instance of the attribute of type T /// </returns> public static T GetAttributeOrDefault<T>(this MetaTable table) where T : Attribute, new() { return table.Attributes.OfType<T>().DefaultIfEmpty(new T()).FirstOrDefault(); } /// <summary> /// Get the attribute of type T or null if not found /// </summary> /// <typeparam name="T"> /// Attribute type /// </typeparam> /// <param name="table"> /// Table to search for the attribute on. /// </param> /// <returns> /// Returns the attribute T or null /// </returns> public static T GetAttribute<T>(this MetaTable table) where T : Attribute { return table.Attributes.OfType<T>().FirstOrDefault(); } /// <summary> /// Get the attribute or a default instance of the attribute /// if the Column attribute do not contain the attribute /// </summary> /// <typeparam name="T"> /// Attribute type /// </typeparam> /// <param name="table"> /// Column to search for the attribute on. /// </param> /// <returns> /// The found attribute or a default /// instance of the attribute of type T /// </returns> public static T GetAttributeOrDefault<T>(this MetaColumn column) where T : Attribute, new() { return column.Attributes.OfType<T>().DefaultIfEmpty(new T()).FirstOrDefault(); } /// <summary> /// Get the attribute of type T or null if not found /// </summary> /// <typeparam name="T">Attribute type</typeparam> /// <param name="table">Column to search for the attribute on.</param> /// <returns>Returns the attribute T or null</returns> public static T GetAttribute<T>(this MetaColumn column) where T : Attribute { return column.Attributes.OfType<T>().FirstOrDefault(); } /// <summary> /// Gets the attribute or default. /// </summary> /// <typeparam name="T"></typeparam> /// <param name="column">The column.</param> /// <returns></returns> public static T GetAttributeOrDefault<T>(this MetaChildrenColumn column) where T : Attribute, new() { return column.Attributes.OfType<T>().DefaultIfEmpty(new T()).FirstOrDefault(); } /// <summary> /// Gets the attribute. /// </summary> /// <typeparam name="T"></typeparam> /// <param name="column">The column.</param> /// <returns></returns> public static T GetAttribute<T>(this MetaChildrenColumn column) where T : Attribute { return column.Attributes.OfType<T>().FirstOrDefault(); } } }the FilterUIHint is build in to ASP.Net 4 onwards.
Always seeking an elegant solution.
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18 Points
156 Posts
Re: How to set the default selected value for the Filters dropdown boxes?
Oct 04, 2012 02:35 PM|pallone|LINK
Hi Steve,
Many thanks for the code. I have 2 questions regarding the code:
1 - Do I have to add a new Class to the project and copy and paste the code? if so I will have to use the name of the class to call the methos
AttributeExtensionMethods.GetAttribute
However, what do I have to do to use it like an extension method without having to call a method?
2 - As per the FilterUIHint you showed, I think I will have to add a new ".ascx" control and call it "DefaultValueBoolean.ascx".
IS that right?
3 - I am not sure what code to put in the new DefaultValueBoolean.ascx. Do I have to just copy the current Boolean.ascx control?
Would you have an example to show me what goes in the new control?
Cheers,
CP
[FilterUIHint("DefaultValueBoolean",null,"Value","True")]
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Re: How to set the default selected value for the Filters dropdown boxes?
Oct 04, 2012 07:13 PM|sjnaughton|LINK
for
if you need an example just e-mail me direct and I will create one for you :)
Always seeking an elegant solution.
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Re: How to set the default selected value for the Filters dropdown boxes?
Oct 05, 2012 10:07 AM|pallone|LINK
Hi Steve,
I would appreciate very much if you could provide an example. I will email you directly using your notaclue email.
Thanks.
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Re: How to set the default selected value for the Filters dropdown boxes?
Oct 05, 2012 10:21 AM|sjnaughton|LINK
Hi Pallone, copy the default Boolean filter and rename the update the Page_Init method like so:
protected void Page_Init(object sender, EventArgs e) { if (!Page.IsPostBack) { if (!Column.IsRequired) DropDownList1.Items.Add(new ListItem("[Not Set]", NullValueString)); PopulateListControl(DropDownList1); // Set the initial value if there is one string initialValue = DefaultValue; var filterUIHint = Column.GetAttribute<FilterUIHintAttribute>(); if (filterUIHint != null && filterUIHint.ControlParameters.ContainsKey("Value")) initialValue = filterUIHint.ControlParameters["Value"].ToString(); if (!String.IsNullOrEmpty(initialValue)) DropDownList1.SelectedValue = initialValue; } }remember to renme the inherits attribute in the control directive in the mark-up
and the class name in the code behind.
all should be good then :)
Also you will need the GetAttibute Extension method see my post
Always seeking an elegant solution.
Member
18 Points
156 Posts
Re: How to set the default selected value for the Filters dropdown boxes?
Oct 11, 2012 09:39 AM|pallone|LINK
Hi Steve,
I am having problems with your DataAnnotation class as follows:
Error 4 The type or namespace name 'RequiredWhenVisibleAttribute' could not be found (are you missing a using directive or an assembly reference?) C:\Dev\BBLDSAccessManager\BBLDSAccessManager\DAL\DataAnnotations.cs 32 48 BBLDSAccessManager
and
Error 5 'AttributeCollection' is an ambiguous reference between 'System.Web.UI.AttributeCollection' and 'System.ComponentModel.AttributeCollection' C:\Dev\BBLDSAccessManager\BBLDSAccessManager\DAL\DataAnnotations.cs 72 55 BBLDSAccessManager
Please can you let me know what I have to do to fix it?
Cheers,
CP
Member
18 Points
156 Posts
Re: How to set the default selected value for the Filters dropdown boxes?
Oct 11, 2012 10:28 AM|pallone|LINK
Steve,
1 - I am also having problems when I call the GetAttribute() method:
var filterUIHint = Column.GetAttribute<FilterUIHintAttribute>();
Error 3 The call is ambiguous between the following methods or properties: 'BBLDSAccessManager.DAL.DynamicDataExtensionMethods.GetAttribute<System.ComponentModel.DataAnnotations.FilterUIHintAttribute>(System.Web.DynamicData.MetaColumn)' and 'BBLDSAccessManager.DAL.AttributeExtensionMethods.GetAttribute<System.ComponentModel.DataAnnotations.FilterUIHintAttribute>(System.Web.DynamicData.MetaColumn)' C:\Dev\BBLDSAccessManager\BBLDSAccessManager\DynamicData\Filters\DefaultValueBoolean.ascx.cs 57 36 BBLDSAccessManager
2 - I think that I am still not sure how to use the public static class AttributeExtensionMethods Data Annotation class extension methods you provided in your post.
Where do I put the class so that my code in the DefaultValueBooleanFilter.asxc.cs can understand the GetAttribute() method?
Column.GetAttribute<FilterUIHintAttribute>();
Cheers,
CP
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Re: How to set the default selected value for the Filters dropdown boxes?
Oct 12, 2012 10:46 AM|sjnaughton|LINK
Hi Pallone, is that in the sample I sent you?
Always seeking an elegant solution.
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Re: How to set the default selected value for the Filters dropdown boxes?
Oct 15, 2012 03:56 AM|pallone|LINK
Hi Steve,
Unfortunately, I did not get your sample. Did you forget to attach it to the email?
Cheers,
CP
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Re: How to set the default selected value for the Filters dropdown boxes?
Oct 15, 2012 05:50 AM|sjnaughton|LINK
I'll try again sorry about that. Hi Pallone, I didn't send a sample but did include all the required code in my previous posts, I will do a quick sample and e-mail it now :)
Always seeking an elegant solution.
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Re: How to set the default selected value for the Filters dropdown boxes?
Oct 15, 2012 06:16 AM|sjnaughton|LINK
Sample sent
Always seeking an elegant solution.
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Re: How to set the default selected value for the Filters dropdown boxes?
Oct 15, 2012 08:23 AM|pallone|LINK
Thank Steve,
I will have a look.
CP