ICertView::SetRestriction method (certview.h)

Article
10/13/2021

The SetRestriction method sets the sorting and qualifying restrictions on a column.

Syntax

HRESULT SetRestriction(
  [in] LONG          ColumnIndex,
  [in] LONG          SeekOperator,
  [in] LONG          SortOrder,
  [in] const VARIANT *pvarValue
);

Parameters

[in] ColumnIndex

A valid column index number for the view or a predefined column specifier. If the ColumnIndex parameter is not negative, this value represents the zero-based index of the column that is receiving the restriction.

If the ColumnIndex parameter is negative, all other parameters are ignored, and this parameter must be one of the following values.

Value	Meaning
CV_COLUMN_LOG_DEFAULT	Restricts view to requests that have been resolved. A request is resolved if it has resulted in an issued certificate or a failed request; revoked certificates are considered resolved.
CV_COLUMN_LOG_FAILED_DEFAULT	Restricts view to requests that have failed.
CV_COLUMN_QUEUE_DEFAULT	Restricts view to requests that have not been resolved; if a request has resulted in either an issued certificate or a failed request, it will not be part of the view.

[in] SeekOperator

Specifies the logical operator of the data-query qualifier for the column. This parameter is used with the pvarValue parameter to define the data-query qualifier. This parameter must be set to one of the following values.

Value	Meaning
CVR_SEEK_EQ	Equal to
CVR_SEEK_LE	Less than or equal to
CVR_SEEK_LT	Less than
CVR_SEEK_GE	Greater than or equal to
CVR_SEEK_GT	Greater than

[in] SortOrder

Specifies the sort order for the column. Indexed columns with zero or one restriction can include a sort order of CVR_SORT_ASCEND or CVR_SORT_DESCEND. Nonindexed columns or columns with two or more restrictions must use CVR_SORT_NONE.

Value	Meaning
CVR_SORT_ASCEND	Ascending
CVR_SORT_DESCEND	Descending
CVR_SORT_NONE	No sort order

[in] pvarValue

Specifies the data query qualifier applied to this column. This parameter, along with the SeekOperator parameter, determines which data is returned to the Certificate Services view.

Return value

VB

If the method succeeds, the method returns S_OK.

If the method fails, it returns an HRESULT value that indicates the error. For a list of common error codes, see Common HRESULT Values.

Remarks

The ICertView object maintains an array of restrictions, allowing each column to contain any number of restrictions. After the column restrictions are established, a call to the ICertView::OpenView method will retrieve the data, with each column's restrictions used as part of the database query.

Before the SetRestriction method is called, it is necessary to establish a connection with the Certificate Service server by calling the ICertView::OpenConnection method.

Examples

    // This example restricts the data
    // to rows that have RequestIDs greater than five.
    // pCertView is a pointer to ICertView.
    HRESULT    hr;
    VARIANT    varRest;
    LONG       nIndex;
    BSTR       bstrCol = NULL;

    // Use one column in the result set.
    hr = pCertView->SetResultColumnCount(1);
    if (FAILED(hr))
    {
        printf("Failed SetResultColumnCount - %x\n", hr);
        goto error;
    }
    // Determine the column index for RequestID column.
    bstrCol = SysAllocString(TEXT("RequestID"));
    hr = pCertView->GetColumnIndex(FALSE, bstrCol, &nIndex);
    if (FAILED(hr))
    {
        printf("Failed GetColumnIndex - %x\n", hr);
        goto error;
    }
    // Place this column into the result set.
    pCertView->SetResultColumn(nIndex);
    // Set a restriction on this column.
    VariantInit(&varRest);
    varRest.vt = VT_I4;
    varRest.lVal = 5;
    // Restrict view to requests with ID greater than 5.
    hr = pCertView->SetRestriction(nIndex,
                                   CVR_SEEK_GT,
                                   CVR_SORT_NONE,
                                   &varRest);
    if (S_OK != hr)
        printf("Failed ICertView::SetRestriction - %x\n", hr);
    else
	{
        // Call OpenView, process rows, release resources, and so on.
        // ...
	}
error:
    // Done processing, clear resources.
    VariantClear(&varRest);
    if (NULL != bstrCol)
        SysFreeString(bstrCol);

Requirements

Requirement	Value
Minimum supported client	None supported
Minimum supported server	Windows Server 2003 [desktop apps only]
Target Platform	Windows
Header	certview.h (include Certsrv.h)
Library	Certidl.lib
DLL	Certadm.dll

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