在 Report Viewer 中设置参数

Question

我希望我的报告显示所有库存低于 搜索 文本框中插入的值的产品。有错误。

这是存储过程：

CREATE PROCEDURE [dbo].[GetInventoryReport]
    @Stock int
AS
    SELECT * 
    FROM Product
    WHERE Stock < @Stock
    ORDER BY Stock ASC

这是用户在搜索文本框中输入值时的代码。

private void txtSearch_TextChanged(object sender, EventArgs e)
{
    DataTable dtbl = GetInventoryReport_Result();

    rptInventoryStock.Visible = true;
    rptInventoryStock.LocalReport.ReportPath = "InventoryReport.rdlc";
    rptInventoryStock.LocalReport.DataSources.Clear();

    rptInventoryStock.LocalReport.Add(new ReportDataSource("IOOP_DatabaseDataSet", dtbl));

    this.rptInventoryStock.RefreshReport();
}

这是GetInventoryReport_Result()的函数：

private DataTable GetInventoryReport_Result()
{
    DataTable dtbl = new DataTable();

    try
    {
        SqlCommand sqlCmd = new SqlCommand("GetInventoryReport", sqlCon);
        sqlCmd.CommandType = CommandType.StoredProcedure;
        sqlCmd.Parameters.AddWithValue("@Stock", txtSearch.Text.Trim());

        SqlDataAdapter sqlDa = new SqlDataAdapter(sqlCmd);
        sqlDa.Fill(dtbl);
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message, "Error Message");
    }
    finally
    {
        if (sqlCon != null)
            sqlCon.Close();
    }

    return dtbl;
}

错误：

'Microsoft.Reporting.WinForms.LocalReport' does not contain a definition for 'Add' and no extension method 'Add' accepting a first argument of type 'Microsoft.Reporting.WinForms.LocalReport' could be found (are you missing a using directive or an assembly reference?)

Answer 1

你错过了.DataSources

替换：

rptInventoryStock.LocalReport.Add(new ReportDataSource("IOOP_DatabaseDataSet", dtbl));

与

rptInventoryStock.LocalReport.DataSources.Add(new ReportDataSource("IOOP_DatabaseDataSet", dtbl));