Error - Input string not in correct format

public static DataSet getProjectNoteDetail(int projNote_Id)
        {
            SqlParameter[] param = new SqlParameter[1];
            param[0] = new SqlParameter("@projNote_Id", projNote_Id);
            //return SqlHelper.ExecuteDataset(strConn, CommandType.StoredProcedure, "getProjectNoteDetailById", param);
            return SqlHelper.ExecuteDataset(strConn, CommandType.Text, "select * from tbl_projnotes where projnote_Id = @projNote_Id", param);
        }

Aspx

                               
                                    ">
                                       
                                            <%#(((RepeaterItem)Container).ItemIndex+1).ToString()%>
                                       
                                       
                                            <%#Eval("projNote_Title") %>
                                       
                                       
                                            <%#Eval("projNote_Note") %>
                                       
                                       
                                            <%#Eval("projNote_FileAttached") %>
                                       
                                       
                                                                                            runat="server" ImageUrl="~/resources/Images/edit.png" />
                                                                                            CommandArgument='<%#Eval("projNote_Id") %>' runat="server" ImageUrl="~/resources/Images/viewDetails_Icon.png" />
                                       
                                   
                               
                           

                                       
                                           

                                                cellspacing="0" width="100%">
                                               
                                                   
                                                   
                                               
                                               
                                                   
                                                   
                                               
                                           

Project Title	<%#Eval("projNote_title")%>
Project Note	<%#Eval("projNote_Note")%>

                                       
                                   

aspx.cs
protected void repProjects_ItemCommand(object source, RepeaterCommandEventArgs e)
    {
        lblInfoMessage.Text = string.Empty;
        divMessage.Style.Add("display", "none");
        if (e.CommandName == "Edit")
        {
            hfCurrentTab.Value = (0).ToString();//======= To show the add tabcontainer on postback
            hfSelectedRecord.Value = e.CommandArgument.ToString();

            bindProjectRecordsToEdit(Convert.ToInt32(e.CommandArgument));
            tabContainerProjects.ActiveTabIndex = 0;
            btnSaveProject.Visible = false;
            btnUpdateProject.Visible = true;
        }
        else if (e.CommandName == "View")//====== To show the complete details of the project.
        {
            repProjectDetails.DataSource = clsManageNoteMethods.getProjectNoteDetail(Convert.ToInt32(e.CommandArgument));
            repProjectDetails.DataBind();
            mpeProjectDetails.Show();
        }
    }

When i click on View it gives error -- Input string was not in a correct format.

Thanx