A data source instance has not been supplied for the data source 'Request'

问题

I'm getting an error on my reportviewer which I am not sure how to correct this.... The error that I am gettings is : " A data source instance has not been supplied for the data source 'Request'." I have tried searching for this, but can't find anything that I can see that is wrong, can somebody please point me in the right direction? This is how my reportvierer looks like:

    <rsweb:ReportViewer ID="rptViewer" runat="server" Height="654px" 
Width="924px" Font-Names="Verdana" Font-Size="8pt" 
    InteractiveDeviceInfos="(Collection)" WaitMessageFont-Names="Verdana" 
    WaitMessageFont-Size="14pt">
    <LocalReport ReportPath="Report.rdlc">
    </LocalReport>

This is the code I use for the reportviewer:

    SqlConnection conn;

protected void Page_Load(object sender, EventArgs e)
{
    conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);

    conn.Open();

    if (!Page.IsPostBack)
    {
        runRptViewer();
    } 

}
    private DataTable getData()
{
    DataSet dss = new DataSet();
    string sql = "";
    sql = "SELECT CC_Request.Company, CC_Request.Attention, CC_Request.Telephone, CC_Request.Email, CC_Items.Model, CC_Items.SerialNo, CC_ItemsRequested.Item, CC_ItemsRequested.Quantity, CC_ItemsRequested.Price, CC_ItemsRequested.ModelID, CC_Items.RequestID FROM CC_Request INNER JOIN CC_Items ON CC_Request.RequestID = CC_Items.RequestID INNER JOIN CC_ItemsRequested ON CC_Items.ModelID = CC_ItemsRequested.ModelID WHERE (CC_Request.Company = 'Alpha') AND (CC_ItemsRequested.ModelID = 20) AND (CC_Items.RequestID = 1)";
    SqlDataAdapter da = new SqlDataAdapter(sql, conn);
    da.Fill(dss);
    DataTable dt = dss.Tables[0];
    return dt;
}

private void runRptViewer()
{
    this.rptViewer.Reset();
    this.rptViewer.LocalReport.ReportPath = Server.MapPath("Reports\\Report.rdlc");
    ReportDataSource rds = new ReportDataSource("dsNewDataSet_Table", getData());
    this.rptViewer.LocalReport.DataSources.Clear();
    this.rptViewer.LocalReport.DataSources.Add(rds);
    this.rptViewer.DataBind();
    this.rptViewer.LocalReport.Refresh();
}

Any help will be greatly appreciated.

EDIT-----------------------

this does not work either:

    private DataTable getData()
{
    DataTable dtable = new DataTable();
    dtable.TableName = "dtNewDataSet_Table";
    string sql = "";
    sql = "SELECT CC_Request.Company, CC_Request.Attention, CC_Request.Telephone, CC_Request.Email, CC_Items.Model, CC_Items.SerialNo, CC_ItemsRequested.Item, CC_ItemsRequested.Quantity, CC_ItemsRequested.Price, CC_ItemsRequested.ModelID, CC_Items.RequestID FROM CC_Request INNER JOIN CC_Items ON CC_Request.RequestID = CC_Items.RequestID INNER JOIN CC_ItemsRequested ON CC_Items.ModelID = CC_ItemsRequested.ModelID WHERE (CC_Request.Company = 'Alpha') AND (CC_ItemsRequested.ModelID = 20) AND (CC_Items.RequestID = 1)";
    SqlDataAdapter da = new SqlDataAdapter(sql, conn);
    da.Fill(dtable);
    DataTable dt = dtable;
    return dt;
}

回答1:

I was also facing this problem that's why I came here.

I figure out the problem and I am posting that here to help some one who get this type of issue.

My data source of RDLC was "dsClientPayList"

I was adding the data source in my code behind like:

ReportViewer1.LocalReport.DataSources.Clear(); 
ReportDataSource rd = new ReportDataSource("dsData1", DAL.MyDBModel.snData().Tables[0]);
ReportViewer1.LocalReport.DataSources.Add(rd);

and it was throwing same error.

Solution:

In my code behind I changed the parameter of ReportDataSource from "dsData1" to "dsClientPayList" (same as in RDLC).

ReportDataSource rd = new ReportDataSource("dsClientPayList", DAL.MyDBModel.snData().Tables[0]);

And it works

Conclusion: The DataSource name must be same in both RDLC and ReportViewer.

Thanks Happy Coding :)

回答2:

You have to set all of the datasources that using in the report.

In this case if there is only one datasource it should be like this

ReportDataSource rds = new ReportDataSource("Request", getData());

回答3:

I would rather do it with "using" statement for correct object disposal and error handling

using (SqlConnection conn = new SqlConnection(connStr)) {
using(SqlCommand comm = new SqlCommand()) {
comm.Connection = conn;
comm.CommandText = sql;

...

try {
conn.Open();
comm.ExecuteNonQuery();
}
catch(SqlException e) {
// in case something is wrong
}
}
}

来源：https://stackoverflow.com/questions/15781133/a-data-source-instance-has-not-been-supplied-for-the-data-source-request

标签

datatable

datasource

reportviewer

rdlc