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Syncfusion Feedback

RowFilter error

Thread ID:





23057 Jan 4,2005 07:58 AM UTC Oct 20,2008 06:24 AM UTC WinForms 3
Tags: GridControl
Administrator [Syncfusion]
Asked On January 4, 2005 07:58 AM UTC

When i am applying row filter using dataview for the DataBoundGrid i m getting below error for 2 filter rest of the filters are working. Cannot perform ''>'' operation on System.String and System.Int32. at System.Data.BinaryNode.SetTypeMismatchError(Int32 op, Type left, Type right) at System.Data.BinaryNode.Compare(Object vLeft, Object vRight, Type type, Int32 op) at System.Data.BinaryNode.EvalBinaryOp(Int32 op, ExpressionNode left, ExpressionNode right, DataRow row, DataRowVersion version, Int32[] recordNos) at System.Data.BinaryNode.Eval(DataRow row, DataRowVersion version) at System.Data.DataFilter.Invoke(DataRow row, DataRowVersion version) at System.Data.Index.AcceptRecord(Int32 record) at System.Data.Index.InitRecords() at System.Data.Index..ctor(DataTable table, Int32[] indexDesc, DataViewRowState recordStates, IFilter rowFilter) at System.Data.DataTable.GetIndex(Int32[] indexDesc, DataViewRowState recordStates, IFilter rowFilter) at System.Data.DataView.UpdateIndex(Boolean force) at System.Data.DataView.SetIndex(String newSort, DataViewRowState newRowStates, DataFilter newRowFilter) at System.Data.DataView.set_RowFilter(String value) at Slb.Horizon.UI.Applications.WFTI.SlbWFTIPretestListingUI.FilterRows() at Slb.Horizon.UI.Applications.WFTI.SlbWFTIPretestListingUI.m_BtnApplyRowFilter_ClickEventHandler(Object sender, EventArgs e) at System.EventHandler.Invoke(Object sender, EventArgs e) at System.Windows.Forms.Control.OnClick(EventArgs e) at System.Windows.Forms.Button.OnClick(EventArgs e) at System.Windows.Forms.Button.WndProc(Message& m) at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Administrator [Syncfusion]
Replied On January 4, 2005 09:09 AM UTC

From the error, it looks like you are trying to say something like dataView1.RowFilter = "[Col1] > 14" where the Col1 DataColumn in your DataTable is of type string. So, take a look at the help on DataColumn.Expression. It shows the syntax that is permissable for Expression and this is the same as for RowFilter. I think you woul dneed to use the Convert function to convert teh string into an integer before you try to compare it to another integer.

Administrator [Syncfusion]
Replied On October 17, 2008 01:12 PM UTC

i m also getting the error "Cannot perform '=' operation on System.String and System.Int32."

can u plz tell me what could be the reason for this how to solve this.

the datatype of column
patientid ------bigint

what i m trying to do in page_load is like this.

protected void Page_Load(object sender, EventArgs e)
if (!Page.IsPostBack)


public void BindGrid()
string ConnectionString = ConfigurationManager.ConnectionStrings["xxx"].ConnectionString;
SqlConnection myCon = new SqlConnection(ConnectionString);
SqlCommand myCmd = (SqlCommand)myCon.CreateCommand();
myCmd.CommandType = CommandType.Text;
string strsql = "Select patientid,forename,salutation from TableA";
myCmd.CommandText = strsql;
SqlDataAdapter da = new SqlDataAdapter(myCmd);
DataSet ds = new DataSet();
da.Fill(ds, "MyTable");
GridView1.DataSource = ds;
catch (Exception ex)
string strException = ex.Message.ToString();


in aspx page:

forecolor="Khaki" font-bold="True" />




DataSource='<%# BindSalutation() %>' DataTextField="SalutationType" DataValueField="SalutationType" SelectedValue='<%# Bind("SalutationType") %>' >


Jisha Joy [Syncfusion]
Replied On October 20, 2008 06:24 AM UTC

Hi Hashmat,

Could you please let me know which Syncfusion control you are using?. We provide support to Syncfusion control only?

Please let me know if you have any questions.



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