보고서 뷰어 X Dapper

c# dapper reportviewer

문제

Dapper를 사용하여 쿼리로 ReportDataSource 를 제공하고 있습니다. 그러나 IEnumerable 로드 된 데이터가있는 경우에도 비어있는 보고서가 있습니다. Datatable 효과가 있습니다.

ReportViewer Dapper를 사용하여 쿼리의 데이터를 전달하려면 어떻게합니까?

this.reportViewer.LocalReport.DataSources.Clear(); 
DataTable dt = new DataTable(); 

dt = CN.Query(Sql, param);

Microsoft.Reporting.WinForms.ReportDataSource rprtDTSource = new Microsoft.Reporting.WinForms.ReportDataSource(dt.TableName, dt); 
this.reportViewer.LocalReport.DataSources.Add(rprtDTSource); 
this.reportViewer.RefreshReport(); –

수락 된 답변

Dapper가 DataTable을 지원 하는 것처럼 보입니다 ...

테스트에서 :

public void ExecuteReader()
{
    var dt = new DataTable();
    dt.Load(connection.ExecuteReader("select 3 as [three], 4 as [four]"));
    dt.Columns.Count.IsEqualTo(2);
    dt.Columns[0].ColumnName.IsEqualTo("three");
    dt.Columns[1].ColumnName.IsEqualTo("four");
    dt.Rows.Count.IsEqualTo(1);
    ((int)dt.Rows[0][0]).IsEqualTo(3);
    ((int)dt.Rows[0][1]).IsEqualTo(4);
}

또한 이제 DataTable을 TableValueParameter로 사용하여 지원됩니다 .

public void DataTableParameters()
{
    try { connection.Execute("drop proc #DataTableParameters"); } catch { }
    try { connection.Execute("drop table #DataTableParameters"); } catch { }
    try { connection.Execute("drop type MyTVPType"); } catch { }
    connection.Execute("create type MyTVPType as table (id int)");
    connection.Execute("create proc #DataTableParameters @ids MyTVPType readonly as select count(1) from @ids");

    var table = new DataTable { Columns = { { "id", typeof(int) } }, Rows = { { 1 }, { 2 }, { 3 } } };

    int count = connection.Query<int>("#DataTableParameters", new { ids = table.AsTableValuedParameter() }, commandType: CommandType.StoredProcedure).First();
    count.IsEqualTo(3);

    count = connection.Query<int>("select count(1) from @ids", new { ids = table.AsTableValuedParameter("MyTVPType") }).First();
    count.IsEqualTo(3);

    try
    {
        connection.Query<int>("select count(1) from @ids", new { ids = table.AsTableValuedParameter() }).First();
        throw new InvalidOperationException();
    } catch (Exception ex)
    {
        ex.Message.Equals("The table type parameter 'ids' must have a valid type name.");
    }
}

인기 답변

Dapper.Query 쿼리에 내 ReportViewer를 공급하는 또 다른 방법을 찾지 못했기 때문에 소스를 다운로드하고 아래 코드를 추가했습니다.

    #region CODTEC SISTEMAS
    /// <summary>
    /// Return a typed list of objects, reader is closed after the call
    /// </summary>
    public static DataTable Query(this IDbConnection cnn, string sql, object param, IDbTransaction transaction, int? commandTimeout, CommandType? commandType)
    {
        var identity = new Identity(sql, commandType, cnn, typeof(DapperRow), param == null ? null : param.GetType(), null);
        var info = GetCacheInfo(identity);

        IDbCommand cmd = null;
        IDataReader reader = null;

        bool wasClosed = cnn.State == ConnectionState.Closed;
        try
        {
            cmd = SetupCommand(cnn, transaction, sql, info.ParamReader, param, commandTimeout, commandType);

            if (wasClosed) cnn.Open();
            reader = cmd.ExecuteReader(wasClosed ? CommandBehavior.CloseConnection : CommandBehavior.Default);
            wasClosed = false; // *if* the connection was closed and we got this far, then we now have a reader
            // with the CloseConnection flag, so the reader will deal with the connection; we
            // still need something in the "finally" to ensure that broken SQL still results
            // in the connection closing itself

            DataTable dt = new DataTable();
            dt.Load(reader);


            // happy path; close the reader cleanly - no
            // need for "Cancel" etc
            reader.Dispose();
            reader = null;

            return dt;
        }
        finally
        {
            if (reader != null)
            {
                if (!reader.IsClosed) try { cmd.Cancel(); }
                    catch { /* don't spoil the existing exception */ }
                reader.Dispose();
            }
            if (wasClosed) cnn.Close();
            if (cmd != null) cmd.Dispose();
        }
    }
    #endregion


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아래 라이선스: CC-BY-SA with attribution
와 제휴하지 않음 Stack Overflow