gistfile1.cs

// set the DataSourceManager master table
// in order to retrieve the available column names
dsManager.MasterDataTableInfo = dsManager.DataTables[cbMergeBlocks.Text];

// create a new MergeBlockInfo to specify instructions
MergeBlockInfo mergeBlockInfo = new MergeBlockInfo(cbMergeBlocks.Text);

// the SortingInstructions specify how the block should be sorte
// Sorting: Ascending by Price
mergeBlockInfo.SortingInstructions = 
    new List<TXTextControl.DocumentServer.DataShaping.SortingInstruction>()
{
    new TXTextControl.DocumentServer.DataShaping.SortingInstruction(
        "Price", 
        TXTextControl.DocumentServer.DataShaping.SortOrder.Ascending)
};

// the Filters define which rows are displayed
// Filter: Price > 500
mergeBlockInfo.Filters = 
    new List<TXTextControl.DocumentServer.DataShaping.FilterInstruction>()
{
    new TXTextControl.DocumentServer.DataShaping.FilterInstruction(
        "Price", 
        TXTextControl.DocumentServer.DataShaping.RelationalOperator.GreaterThan, 
        500
        )
};

// the BlockMergingCondition can be used to conditionally render a block
// based on a condition in the parent table
// Condition: If Name property is Test Report
mergeBlockInfo.BlockMergingCondition = 
    new List<TXTextControl.DocumentServer.DataShaping.FilterInstruction>()
{
    new TXTextControl.DocumentServer.DataShaping.FilterInstruction(
        "Name", 
        TXTextControl.DocumentServer.DataShaping.RelationalOperator.Equals, 
        "Test Report"
        )
};

// specify the column names
mergeBlockInfo.ColumnNames = dsManager.PossibleMergeFieldColumns.Select(
    column => column.ColumnName).ToList();

// define the block itself
MergeBlockSettings blockSettings = new MergeBlockSettings(BlockTemplateType.TableRow, true);

// insert the block
dsManager.InsertMergeBlock(textControl1, mergeBlockInfo, blockSettings);