Simple demonstration on how to create reports with report viewer in just 5 steps.
Step 1. Create a Web Page Report.aspx in your asp.net web application.
Put the below code between html tag
Report.aspx

<div style="width: 100%">
    <div class="borderbox">
        <table border="0px" style="width: 100%;">
            <tr>
                <td style="width: 80px">Start Date :</td>
                <td style="width: 120px">
                    <asp:TextBox ID="txtStartDate" runat="server" Style="width: 100px"></asp:TextBox>
                    <ajaxtoolkit:CalendarExtender ID="CalendarExtender1" runat="server" TargetControlID="txtStartDate">
                    </ajaxtoolkit:CalendarExtender>
                </td>
                <td style="width: 80px">End Date :</td>
                <td style="width: 120px">
                    <asp:TextBox ID="txtEndDate" runat="server" Style="width: 100px"></asp:TextBox>
                    <ajaxtoolkit:CalendarExtender ID="CalendarExtender2" runat="server" TargetControlID="txtEndDate">
                    </ajaxtoolkit:CalendarExtender>
                </td>
                <td>
                    <asp:Button ID="btnShow" runat="server" Text="View" OnClick="btnShow_Click" />
                </td>
            </tr>
        </table>
    </div>
</div>
<div style="width: 100%">
    <rsweb:ReportViewer ID="ReportViewer1" runat="server" Height="400px" Width="100%"
        Font-Names="Verdana" Font-Size="8pt" InteractiveDeviceInfos="(Collection)" WaitMessageFont-Names="Verdana"
        WaitMessageFont-Size="14pt" PageCountMode="Actual">
    </rsweb:ReportViewer>
</div>

Add the report viewer reference on your page

<%@ Register Assembly="Microsoft.ReportViewer.WebForms, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"
    Namespace="Microsoft.Reporting.WebForms" TagPrefix="rsweb" %>

Write the below code on the page load event

protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            txtStartDate.Text = DateTime.Now.ToString("MM/dd/yyyy");
            txtEndDate.Text = DateTime.Now.ToString("MM/dd/yyyy ");
        }
    }

Write the below code on button click event

protected void btnShow_Click(object sender, EventArgs e)
    {
        try
        {
            DataTable dt = new DataTable();
            Report objReport = new Report();
            dt = objReport.getReport(txtStartDate.Text, txtEndDate.Text);
            ReportViewer1.LocalReport.ReportPath = Server.MapPath("Report.rdlc");
            ReportViewer1.LocalReport.DataSources.Clear();
            ReportDataSource _rsource = new ReportDataSource("dsReport", dt);
            ReportViewer1.LocalReport.DataSources.Add(_rsource);
            ReportViewer1.LocalReport.Refresh();
        }
        catch (Exception ex)
        {
        }
    }

Step 2.  Add a data set to your Application.
Give it a name “dsReport”.
Now at the data set interface right click and select data table.
Add columns to data table

Step 3.  Add a Report Viewer file to your application.

Step 4.  Add data set to Report.rdlc file.
Go to View select report data.

Select your data source and available data sets.

Step 5. Add matrix to report viewer.

Select columns from data set.

Report is ready.