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ParameterInProperty.Required Property

Windows SharePoint Services 3

NOTE: This API is now obsolete.

Gets or sets the required status of a parameter provided by a WebPart that implements the IParametersInConsumer interface when the ParametersInConsumerInitevent occurs.

Namespace:  Microsoft.SharePoint.WebPartPages.Communication
Assembly:  Microsoft.SharePoint (in Microsoft.SharePoint.dll)

[ObsoleteAttribute("Use System.Web.UI.WebControls.WebParts.IWebPartParameters instead")]
public bool Required { get; set; }

Property Value

Type: System.Boolean
true if the parameter is required; otherwise, false.

The Required property indicates whether a parameter is required or not. If false is specified, indicating that the parameter is optional, and no mapping is specified by the user, then an empty string is passed as the value for the optional parameter to the consumer Web Part.

The following code example shows an overridden WebPart.PartCommunicationInitmethod that sets the Required property of an instance of the ParameterInProperty class. This code example is part of a larger example provided for the IParametersInConsumer interface.

// Step #7: Override the PartCommunicationInit method.
// The PartCommunicationInit method is called by the Web Part 
// infrastructure during the ASP.NET PreRender 
// phase to allow the part to pass initialization information to the 
// other connected parts.
// It is important to always pass initialization information. Some 
// parts may not behave properly if this initialization information is 
// not received.
public override void PartCommunicationInit()
{
    // Ensure all controls have been created.
    EnsureChildControls();

    // Check if connected.
    if(_connected)
    {
       
            // Need to create the ParametersInConsumerInitEventArgs 
            // object for the ParametersInConsumerInit event.
            ParametersInConsumerInitEventArgs parametersInConsumerInitEventArgs = new ParametersInConsumerInitEventArgs();
    
            // Set the ParameterInProperties.
            parametersInConsumerInitEventArgs.ParameterInProperties = new ParameterInProperty[4];

            parametersInConsumerInitEventArgs.ParameterInProperties[0] = new ParameterInProperty();
            parametersInConsumerInitEventArgs.ParameterInProperties[0].Description = _fontFamilyParamDescription;
            parametersInConsumerInitEventArgs.ParameterInProperties[0].ParameterDisplayName = _fontFamilyParamDisplayName;
            parametersInConsumerInitEventArgs.ParameterInProperties[0].ParameterName = _fontFamilyParamName;
            parametersInConsumerInitEventArgs.ParameterInProperties[0].Required = true;

            parametersInConsumerInitEventArgs.ParameterInProperties[1] = new ParameterInProperty();
            parametersInConsumerInitEventArgs.ParameterInProperties[1].Description = _fontColorParamDescription;
            parametersInConsumerInitEventArgs.ParameterInProperties[1].ParameterDisplayName = _fontColorParamDisplayName;
            parametersInConsumerInitEventArgs.ParameterInProperties[1].ParameterName = _fontColorParamName;
            parametersInConsumerInitEventArgs.ParameterInProperties[1].Required = false;

            parametersInConsumerInitEventArgs.ParameterInProperties[2] = new ParameterInProperty();
            parametersInConsumerInitEventArgs.ParameterInProperties[2].Description = _fontWeightParamDescription;
            parametersInConsumerInitEventArgs.ParameterInProperties[2].ParameterDisplayName = _fontWeightParamDisplayName;
            parametersInConsumerInitEventArgs.ParameterInProperties[2].ParameterName = _fontWeightParamName;
            parametersInConsumerInitEventArgs.ParameterInProperties[2].Required = true;

            parametersInConsumerInitEventArgs.ParameterInProperties[3] = new ParameterInProperty();
            parametersInConsumerInitEventArgs.ParameterInProperties[3].Description = _fontSizeParamDescription;
            parametersInConsumerInitEventArgs.ParameterInProperties[3].ParameterDisplayName = _fontSizeParamDisplayName;
            parametersInConsumerInitEventArgs.ParameterInProperties[3].ParameterName = _fontSizeParamName;
            parametersInConsumerInitEventArgs.ParameterInProperties[3].Required = false;

            // Fire the ParametersInConsumerInit event.
            ParametersInConsumerInit(this, parametersInConsumerInitEventArgs);
       
    }
}

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