Questions on UI for ASP.NET AJAX Forum

3 answers

145 views

Telerik Team,

I am using telerik grid in my application.

When the filter for the grid is shown on when I check the display filter checkbox and I click on Add New Record or Edit the Record then I get the following error stated below.

Line: 6

Error: Sys.WebForms.PageRequestManagerServerErrorException: Object reference not set to an instance of an object.

My code is as below

<body>

<form id="form1" runat="server">

<telerik:RadScriptManager ID="ScriptManager" runat="server" />

<fieldset class="configureFieldsetClass">

<legend>Grid</legend>

<table class="configureTableClass">

<tr>

<td align="right">

<asp:CheckBox ID="CheckBox1" Text="Display Filter" runat="server" OnCheckedChanged="displayfilter_checkchanged"

AutoPostBack="true" />

</td>

</tr>

<tr>

<td>

<telerik:RadGrid ID="dgGrid" runat="server" AllowSorting="True" FilterItemStyle-HorizontalAlign="Center"

AllowFilteringByColumn="false" AllowPaging="true" PageSize="10" AutoGenerateColumns="false"

AllowAutomaticDeletes="True" AllowAutomaticInserts="True" AllowAutomaticUpdates="True"

OnNeedDataSource="dgGrid_NeedDataSource" OnInsertCommand="dgGrid_ItemInserted"

OnUpdateCommand="dgGrid_ItemInserted" OnDeleteCommand="dgGrid_ItemInserted">

<GroupHeaderItemStyle></GroupHeaderItemStyle>

<FilterMenu>

</FilterMenu>

<PagerStyle AlwaysVisible="true" Mode="NextPrevAndNumeric" />

<MasterTableView BorderWidth="0" ShowFooter="False" EditMode="InPlace" GridLines="Both"

Font-Names="Arial" CommandItemDisplay="top" AutoGenerateColumns="false" InsertItemDisplay="Bottom"

DataKeyNames="PARAM_GRID_ITEM_ID" CommandItemSettings-ShowRefreshButton="false"

CommandItemSettings-AddNewRecordText="Add New Record">

<PagerStyle AlwaysVisible="true" Mode="NextPrevAndNumeric" />

<RowIndicatorColumn Visible="False" UniqueName="RowIndicator">

<HeaderStyle></HeaderStyle>

<ItemStyle></ItemStyle>

</RowIndicatorColumn>

<Columns>

<telerik:GridEditCommandColumn ButtonType="ImageButton" EditImageUrl="Images/Edit.jpg"

ItemStyle-Wrap="true" HeaderStyle-Width="8%">

</telerik:GridEditCommandColumn>

<telerik:GridBoundColumn UniqueName="COLUMN_NAME" SortExpression="COLUMN_NAME" HeaderText="Column"

DataField="COLUMN_NAME" DataType="System.String" HeaderStyle-Width="20%">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn UniqueName="CAPTION_NAME" SortExpression="CAPTION_NAME" HeaderText="Caption"

DataField="CAPTION_NAME" DataType="System.String" HeaderStyle-Width="25%">

</telerik:GridBoundColumn>

<telerik:GridNumericColumn UniqueName="COLUMN_ORDER" SortExpression="COLUMN_ORDER" HeaderText="Column Order"

DataField="COLUMN_ORDER" HeaderStyle-Width="23%">

</telerik:GridNumericColumn>

<telerik:GridDropDownColumn HeaderText="Data Type" UniqueName="PARAM_TYPE_ID" DataField="PARAM_TYPE_ID"

ListTextField="PARAM_TYPE" ListValueField="PARAM_TYPE_ID" DataSourceID="DsDataType"

SortExpression="PARAM_TYPE_ID" HeaderStyle-Width="20%">

</telerik:GridDropDownColumn>

<telerik:GridBoundColumn UniqueName="PARAM_GRID_ID" SortExpression="PARAM_GRID_ID" HeaderText="PARAM_GRID_ID"

DataField="PARAM_GRID_ID" DataType="System.String" Display="false" HeaderStyle-Width="1%">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn UniqueName="PARAM_GRID_ITEM_ID" SortExpression="PARAM_GRID_ITEM_ID"

HeaderText="PARAM_GRID_ITEM_ID" DataField="PARAM_GRID_ITEM_ID" DataType="System.String"

Display="false" HeaderStyle-Width="1%">

</telerik:GridBoundColumn>

<telerik:GridButtonColumn ButtonType="ImageButton" CommandName="Delete" Text="Delete"

ItemStyle-HorizontalAlign="Center" UniqueName="DeleteColumn" HeaderStyle-Width="5%"

ConfirmText="Confirm that you want to delete the record?" ImageUrl="Images/Delete1.gif"

ConfirmTitle="Delete ?">

</telerik:GridButtonColumn>

</Columns>

<EditFormSettings>

<EditColumn ButtonType="ImageButton" HeaderStyle-Width="50px" />

</EditFormSettings>

</MasterTableView>

<HeaderStyle></HeaderStyle>

<SelectedItemStyle></SelectedItemStyle>

<ItemStyle VerticalAlign="Top"></ItemStyle>

<FooterStyle></FooterStyle>

<HeaderStyle HorizontalAlign="Center" />

<ClientSettings EnableRowHoverStyle="true">

<ClientEvents OnRowMouseOver="RowMouseOver" OnCommand="OnCommand" OnRowMouseOut="RowMouseOut" />

<Selecting AllowRowSelect="True"></Selecting>

<Resizing AllowRowResize="true" EnableRealTimeResize="false" ResizeGridOnColumnResize="false"

AllowColumnResize="false"></Resizing>

</ClientSettings>

</telerik:RadGrid>

</td>

</tr>

</table>

</fieldset>

</form>

</body>

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using Telerik.Web.UI;

using eControls;

using System.Data;

using eDataAccess;

using SRSBO;

using eBusinessObjects;

using System.Text.RegularExpressions;

public partial class Demo : System.Web.UI.Page

{

public int NodeId = -1;

protected void Page_Load(object sender, EventArgs e)

{

if (!(int.TryParse(Request.QueryString["NODEID"], out NodeId)))

{

NodeId = -1;

}

public void displayfilter_checkchanged(object s, EventArgs e)

{

if (CheckBox1.Checked)

{

dgGrid.MasterTableView.AllowFilteringByColumn = true;

}

else

{

dgGrid.MasterTableView.AllowFilteringByColumn = false;

}

dgGrid.GroupingSettings.CaseSensitive = false;

dgGrid.Rebind();

}

protected void dgGrid_ItemInserted(object source, GridCommandEventArgs e)

{

if (e.Item is GridEditableItem && e.Item.IsInEditMode)

{

ConfigureParamBO objConfigureParamBO = new ConfigureParamBO();

ParamGridItemBO pgiBO = new ParamGridItemBO();

ParamGridBO objParamGridBO = new ParamGridBO();

DataTable dtGridDataId = objParamGridBO.GetGridDataIdForNodeId();

if (dtGridDataId.Rows.Count == 0)

{

Boolean isSuccess = SaveGridData();

if (isSuccess)

{

}

dtGridDataId = objParamGridBO.GetGridDataIdForNodeId(Convert.ToInt32(hidNodeId.Value));

ParamGridBO pgBO = new ParamGridBO();

Dictionary<string, object> Adds = new Dictionary<string, object>();

Adds.Add("PARAM_GRID_ID", hidParamGridId.Value.ToString());

dgGrid.InsertGridRecords(source, e, pgiBO, Adds);

dgGrid.Rebind();

}

protected void dgGrid_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)

{

ParamGridItemBO pgiBO = new ParamGridItemBO();

dgGrid.DataSource = pgiBO.getDgGridDataSource(NodeId);

}

A demo source code would be of great help.

Can you please let me know the work around for it?

Thanking you in advance.

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