Insert item is available only when grid is in insert mode

[Lisa]

I want to populate fields within a radgrid with some phony data when the button is clicked.
The GetInsertItem() statement causes exception:
Exception Details: Telerik.Web.UI.GridException: Insert item is available only when grid is in insert mode.

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<div>
  <telerik:RadButton runat="server" ID="RadButton1" AutoPostBack="true" Text="fill data"  ButtonType="LinkButton" onclick="RadButton1_Click"></telerik:RadButton>
</div>

<telerik:RadAjaxPanel runat=server>
    <telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="False"
            ShowStatusBar="True" GridLines="None"  OnNeedDataSource="RadGrid1_NeedDataSource" OnUpdateCommand="RadGrid1_UpdateCommand"
            OnInsertCommand="RadGrid1_InsertCommand" OnCreateColumnEditor="RadGrid1_CreateColumnEditor"
            OnPreRender="RadGrid1_PreRender" OnItemDataBound="RadGrid1_ItemDataBound" OnItemCreated="RadGrid1_ItemCreated">

            <MasterTableView DataKeyNames="id" CommandItemDisplay="Top">
                <Columns>
                    <telerik:GridBoundColumn HeaderText="Emp" DataField="emp" UniqueName="emp">



protected void RadButton1_Click(object sender, EventArgs e)
{
        GridEditFormInsertItem i = (GridEditFormInsertItem)RadGrid1.MasterTableView.GetInsertItem();
        RadTextBox r = (RadTextBox)i.FindControl("emp");
        r.Text = "Johnny";
}

[Princy]

Hi Lisa,

I was able to replicate the issue.If you are clicking the button without opening the insert form,such an error occurs ,so make sure that the form is open.Then please try the below code snippet to access the textbox of a bound column.

C#:

protected void RadButton1_Click(object sender, EventArgs e)
   {
       {
           GridEditableItem i = (GridEditableItem)RadGrid1.MasterTableView.GetInsertItem();
           TextBox r = (TextBox)i["emp"].Controls[0]; // Access textbox of boundcolumn
           r.Text = "Johnny";
       }
   }

Thanks,
Princy

[Lisa]

Hi Princy, On the page it displays the button and below that is the radgrid. So how can I open the insert form as you suggested? Thanks.

[Jayesh Goyani]

Hello,

<asp:Button ID="Button1" runat="server" Text="Open insert mode in grid"
       onclick="Button1_Click" />
   <asp:Button ID="Button2" runat="server" Text="Set value in Insert mode"
       onclick="Button2_Click" />
   <asp:Button ID="Button3" runat="server" Text="Save the value of insert mode"
       onclick="Button3_Click" />
   <telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="false" OnNeedDataSource="RadGrid1_NeedDataSource"
       OnItemCommand="RadGrid1_ItemCommand">
       <MasterTableView>
           <Columns>
               <telerik:GridBoundColumn DataField="ID" UniqueName="ID" HeaderText="ID">
               </telerik:GridBoundColumn>
           </Columns>
       </MasterTableView>
   </telerik:RadGrid>

protected void RadGrid1_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
   {
       dynamic data = new[] {
           new { ID = 1, Name = "Name1"},
           new { ID = 2, Name = "Name2"},
           new { ID = 3, Name = "Name3"},
           new { ID = 4, Name = "Name4"},
           new { ID = 5, Name = "Name5"}
       };

       RadGrid1.DataSource = data;
   }



   protected void RadGrid1_ItemCommand(object sender, GridCommandEventArgs e)
   {

   }
   protected void Button1_Click(object sender, EventArgs e)
   {
       RadGrid1.MasterTableView.IsItemInserted = true;
       RadGrid1.Rebind();
   }
   protected void Button2_Click(object sender, EventArgs e)
   {
       if (RadGrid1.MasterTableView.IsItemInserted)
       {
           GridEditableItem i = (GridEditableItem)RadGrid1.MasterTableView.GetInsertItem();
           TextBox r = (TextBox)i["ID"].Controls[0]; // Access textbox of boundcolumn
           r.Text = "0";
       }
   }
   protected void Button3_Click(object sender, EventArgs e)
   {
       if (RadGrid1.MasterTableView.IsItemInserted)
       {
           GridEditableItem i = (GridEditableItem)RadGrid1.MasterTableView.GetInsertItem();
           TextBox r = (TextBox)i["ID"].Controls[0]; // Access textbox of boundcolumn
           // Get this textbox text value  and perform your futhur operation
       }

       RadGrid1.MasterTableView.IsItemInserted = false;
       RadGrid1.Rebind();
   }

Thanks,
Jayesh Goyani

[Lisa]

 

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">

<div>

  <telerik:RadButton runat="server" ID="RadButton1" AutoPostBack="true" Text="fill data"  ButtonType="LinkButton" onclick="RadButton1_Click"></telerik:RadButton>

</div>

 

<telerik:RadAjaxPanel runat=server>

    <telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="False"

            ShowStatusBar="True" GridLines="None"  OnNeedDataSource="RadGrid1_NeedDataSource" OnUpdateCommand="RadGrid1_UpdateCommand"

            OnInsertCommand="RadGrid1_InsertCommand" OnCreateColumnEditor="RadGrid1_CreateColumnEditor"

            OnPreRender="RadGrid1_PreRender" OnItemDataBound="RadGrid1_ItemDataBound" OnItemCreated="RadGrid1_ItemCreated">

      

            <MasterTableView DataKeyNames="id" CommandItemDisplay="Top">

                <Columns>

                    <telerik:GridBoundColumn HeaderText="Emp" DataField="emp" UniqueName="emp">

  

 

protected void RadButton1_Click(object sender, EventArgs e)

{

                    RadGrid1.MasterTableView.IsItemInserted = true;

       RadGrid1.Rebind();



        GridEditFormInsertItem i = (GridEditFormInsertItem)RadGrid1.MasterTableView.GetInsertItem();

        RadTextBox r = (RadTextBox)i.FindControl("emp");

        r.Text = "Johnny";

}

Thanks for the example. I want only 1 button, so I take the idea from your example and add:
       RadGrid1.MasterTableView.IsItemInserted = true;

       RadGrid1.Rebind();
It inserts another grid to the page. I do not want 2 grids on the page. What I want is: when the button is clicked, simply replace the text for the text box. How can that be done?

If I could find the control via the parameter Eventargs, that'd be simply changing the text from there.
But how can I find the control via Eventargs?


[Lisa]

Any suggestion please?

[Princy]

Hi Lisa,

  Please try the below code snippet to achieve the insert form to be opened as well as fill in the textbox with value.

C#:

protected void RadButton1_Click(object sender, EventArgs e)
   {
       if (!RadGrid1.MasterTableView.IsItemInserted)//To Open insertForm
       {
           RadGrid1.MasterTableView.IsItemInserted = true;
           RadGrid1.Rebind();
       }
       else if (RadGrid1.MasterTableView.IsItemInserted)
       {
           GridEditableItem i = (GridEditableItem)RadGrid1.MasterTableView.GetInsertItem();
           TextBox r = (TextBox)i["emp"].Controls[0]; // Access textbox of boundcolumn
           r.Text = "Johnny";
       }
   }

Thanks,
Princy

[Lisa]

RadGrid1.MasterTableView.IsItemInserted = true;

       RadGrid1.Rebind();
Again, by setting RadGrid1.MasterTableView.IsItemInserted = true;  it inserts another grid to the page. I do not want 2 grids on the page. All I want is: when the button is clicked, simply replace the text for the text box. How can that be done? Let's forget about having to open insert form because it may not be needed. If you  could tell me how to find the control via the parameter Eventargs, I can simply change the text from there. With regular grid I can set the text simply via textbox1.Text = "hello", but with radgrid I don't know how it works, why do I have to deal with open insert form in order to set the text? Is there documentation describing insert form, edit form... that stuff? Thanks.


[Princy]

Hi Lisa,

I think you want to insert a value into the textbox during insert mode.I guess you want to add the text to a bound column.When in insert mode,the boundcolumn will be a textbox and you can set the value of that textbox in insert mode.By setting RadGrid1.MasterTableView.IsItemInserted = true; this is just to open the insert form of the radgrid,it doesn't add a new grid.Could you please elaborate on which mode you want to access the textbox,insert mode or edit mode.Could you please provide your full code aspx and c#.
Below is a code which shows how to access the textbox of bound column and Template columns of a grid on a button click in insert and view mode. The BoundColumn will be a TextBox only in edit/insert mode.

ASPX:

<telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="false"  AutoGenerateEditColumn="true">
    <MasterTableView CommandItemDisplay="Top">
        <Columns>
            <telerik:GridBoundColumn UniqueName="OrderID" DataField="OrderID" HeaderText="OrderID" />
            <telerik:GridTemplateColumn HeaderText="TemplateColumn">
                <ItemTemplate>
                    <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
                </EditItemTemplate>
            </telerik:GridTemplateColumn>
        </Columns>
    </MasterTableView>
</telerik:RadGrid>
<telerik:RadButton runat="server" ID="RadButton1" AutoPostBack="true" Text="fill data"
    ButtonType="LinkButton" OnClick="RadButton1_Click">
</telerik:RadButton>

C#:

protected void RadButton1_Click(object sender, EventArgs e)
{
    if (RadGrid1.MasterTableView.IsItemInserted)//Checking if in Insert mode
    {
        GridEditableItem edititem = (GridEditableItem)RadGrid1.MasterTableView.GetInsertItem();
        TextBox boundtxt = (TextBox)edititem["OrderID"].Controls[0]; // Access textbox of boundcolumn
        boundtxt.Text = "Text1";
        TextBox templatetxt = (TextBox)edititem.FindControl("TextBox2");//Access textbox of Template column
        templatetxt.Text = "Text2";
    }
    foreach (GridDataItem item in RadGrid1.Items)
    {
        TextBox txt = (TextBox)item.FindControl("TextBox1");//Access template textbox in view mode
        txt.Text = "Text3";
    }
}

Thanks,
Princy

[Lisa]

Here is all the code related to this problem. I have a radgrid that contains an emp field. When the page is displayed the very first time, emp is blank. User enters data into the emp field and submit it. A record is inserted into a table in the database to save the emp field.  Whenever the button is clicked, I want it to override the value in the emp field with "Text3". That is all I want it to do.

In RadButton1_Click() it gives object reference not set to an instance of an object error because it cannot find the control emp.

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">

 

<div>

  <telerik:RadButton runat="server" ID="RadButton1" AutoPostBack="true" Text="fill data"  ButtonType="LinkButton" onclick="RadButton1_Click"></telerik:RadButton>

</div>

 

 

<telerik:RadAjaxPanel runat=server>

    <telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="False"

            ShowStatusBar="True" GridLines="None"  OnNeedDataSource="RadGrid1_NeedDataSource" OnUpdateCommand="RadGrid1_UpdateCommand"

            OnInsertCommand="RadGrid1_InsertCommand" OnCreateColumnEditor="RadGrid1_CreateColumnEditor"

            OnPreRender="RadGrid1_PreRender" OnItemDataBound="RadGrid1_ItemDataBound" OnItemCreated="RadGrid1_ItemCreated">

 

            <MasterTableView DataKeyNames="id" CommandItemDisplay="Top">

                <Columns>

                    <telerik:GridBoundColumn HeaderText="Employee" DataField="employee" UniqueName="employee">

</Columns>

<FormTemplate>

                          <telerik:RadTextBox id="emp" runat="server" Text='<%# Bind("emp") %>'   />

protected void page_load(object sender, EventArgs e)
{
    if (!Page.IsPostBack)
    {
        if (data1.Tables[0].Rows.Count < 1)
        {
               RadGrid1.MasterTableView.IsItemInserted = true;
               RadGrid1.Rebind();
        }
       else
               RadGrid1.MasterTableView.IsItemInserted = false;
    }
}  

 

protected void RadButton1_Click(object sender, EventArgs e)

 

{

    foreach (GridDataItem item in RadGrid1.Items)

    {

        RadTextBox txt = (RadTextBox)item.FindControl("emp");

        txt.Text = "Text3";  //got error: object reference not set to an instance of an object

    }

}

[Princy]

Hi Lisa,

I guess you want to change the value of a bound column,in the button click in view mode.In order to access bound columns you can use the table cell to get each column cell by the Unique Name of that column.Please try the below code snippet.Let me know if any concern.

C#:

protected void RadButton1_Click(object sender, EventArgs e)
   {
       foreach (GridDataItem item in RadGrid1.Items)
       {
           TableCell cell = item["emp"];//access boundcolumn
           cell.Text = "Text3";
       }
   }

Thanks,
Princy

[Lisa]

Please note that the column is inside a FormTemplate:
    <FormTemplate>

                          <telerik:RadTextBox id="emp" runat="server" Text='<%# Bind("emp") %>'   />

So, TableCell cell = item["emp"]; will give error.

How can I access the "emp" RadTextBox inside the FormTemplate?

[Princy]

Hi Lisa,

Please try the below code snippet to access a textbox inside FormTemplate in edit mode.

ASPX:

<EditFormSettings EditFormType="Template">
   <FormTemplate>
         <telerik:RadTextBox ID="emp" runat="server" Text='<%# Bind("emp") %>' />
   </FormTemplate>
</EditFormSettings>
. . . . . . . . . . . . . . . . . . . . . .
<telerik:RadButton runat="server" ID="RadButton1" AutoPostBack="true" Text="Fill Data"
    ButtonType="LinkButton" OnClick="RadButton1_Click">
</telerik:RadButton>

C#:

protected void RadButton1_Click(object sender, EventArgs e)
{
  foreach (GridDataItem item in RadGrid1.EditItems)
  {
   RadTextBox txt = item.EditFormItem.FindControl("emp") as RadTextBox;//Accessing RadTextBox in FormTemplate in EditMode
   txt.Text = "Your Text";
  }
}

Hope this helps you.Let me know if any concern.

Thanks,
Princy

[Lisa]

It can find the control now. But because IsItemInserted was set to true, it displays 2 items: 2 "emp" text boxes, one with old text and the other with new text. I do not want it to display 2 items. I just want it to display only one item and replace the old text with the new text for that one item. How can that be done?

protected void page_load(object sender, EventArgs e)
{
    if (!Page.IsPostBack)
    {
        if (data1.Tables[0].Rows.Count < 1)
        {
               RadGrid1.MasterTableView.IsItemInserted = true;
               RadGrid1.Rebind();
        }
       else
               RadGrid1.MasterTableView.IsItemInserted = false;
    }
}

If you review my previous posts, originally I tried the following and it also displayed 2 items:
        GridEditableItem i = (GridEditableItem)RadGrid1.MasterTableView.GetInsertItem();
        RadTextBox r = (RadTextBox)i.FindControl("emp");
        r.Text = "Johnny";

[Princy]

Hi Lisa,

I guess the two Textbox is shown because, the insert and edit mode of the RadGrid is open. Insert form is shown because of the code inside page load [You are populating the RadGrid with a dataset 'data1' in NeedDataSource event. Since the Page_load event fires before NeedDataSource, it will always give the condition 'if(data1.Tables[0].Rows.Count < 1)' as "true" and grid will be in insert mode even though record is there]. Edit form is shown because you are clicking edit button before clicking the RadButton outside Radgrid.

But I can confirm it only after knowing where you are populating the 'data1' dataset. If you are populating in NeedDataSource event check the row count in PreRender event as follows.
C#:

protected void RadGrid1_PreRender(object sender, EventArgs e)

{

    if (!Page.IsPostBack)

    {

        if (RadGrid1.Items.Count < 1) //Checking the row count


        {

            RadGrid1.MasterTableView.IsItemInserted = true;

            RadGrid1.Rebind();

        }

        else

        {

            RadGrid1.MasterTableView.IsItemInserted = false;

        }

    }

}

Please explain more about the scenario and attach a screenshot of the issue if it doesn't help.

Thanks,
Princy.

[Lisa]

"Edit form is shown because you are clicking edit button before clicking the RadButton outside Radgrid."
I didn't click any edit button. Inside the Radgrid, there is:
                    <telerik:GridEditCommandColumn ButtonType="ImageButton" UniqueName="EditCmd" HeaderText="Edit" Visible="false" />
Is that the edit button you are referring to? It's not visible.

When the page is first loaded, it displays the RadButton outside Radgrid and the RadTextBox inside the Radgrid.
I then click the RadButton and it displays 2 text boxes instead of 1.

Here are the codes for the data1 and  RadGrid1_NeedDataSource and RadGrid1_PreRender (which doesn't do anything).

public DataSet data1
{
    get
    {
    //if there is a session value, return that value.
    //otherwise retrieve and return data from database.
    ...
    }
}

protected void RadGrid1_NeedDataSource(object source, GridNeedDataSourceEventArgs e)
{
    RadGrid1.DataSource = this.data1;
}

protected void RadGrid1_PreRender(object sender, EventArgs e)
{
}

protected void page_load(object sender, EventArgs e)
{
    if (!Page.IsPostBack)
    {
        if (data1.Tables[0].Rows.Count < 1)
        {
            RadGrid1.MasterTableView.IsItemInserted = true;
            RadGrid1.Rebind();
        }
        else
            RadGrid1.MasterTableView.IsItemInserted = false;
    }
}

[Princy]

Hi Lisa,

Unfortunately,I'm not able to replicate the issue.Such a scenario is not expected.I'm not clear about how you are getting two textbox to appear.Can u please provide your complete code,C# and ASPX,along with a screenshot of the issue you are facing,so that I may be clear about your scenario .

Thanks,
Princy