grid and button

[Caro]

Hi,

I'd like to create a simple grid with one column not from a database.
And, I'd like to add rows to this grid each time a button is clicked, with the value of a combobox.
I can't do that, it doesnt works.
I'm a beginner, could you please tell me how to make that?

Thanks

[Caro]

Nobody knows how to make that? :(

[Shinu]

Hi Caro,

I guess you want to create rows on Button Click depending up on the value of the ComboBox. Here is a sample code snippet I tried. Please take a look into the following code.

ASPX:

<telerik:RadGrid ID="RadGrid1" runat="server" onneeddatasource="RadGrid1_NeedDataSource">
 <MasterTableView>
   <Columns>
     <telerik:GridTemplateColumn>
       <ItemTemplate>
    <asp:Label ID="Label1" runat="server"></asp:Label>
       </ItemTemplate>
     </telerik:GridTemplateColumn>
   </Columns>
 </MasterTableView>
</telerik:RadGrid>
<telerik:RadComboBox ID="RadComboBox1" runat="server">
 <Items>
  <telerik:RadComboBoxItem Text="1" Value="1" />
  <telerik:RadComboBoxItem Text="2" Value="2" />
  <telerik:RadComboBoxItem Text="3" Value="3" />
  <telerik:RadComboBoxItem Text="4" Value="4" />
 </Items>
</telerik:RadComboBox>
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" />

C#:

public static int num = 0;
protected void Button1_Click(object sender, EventArgs e)
{
    num = Convert.ToInt32(RadComboBox1.SelectedValue);
    RadGrid1.Rebind();
}
protected void RadGrid1_NeedDataSource(object sender, Telerik.Web.UI.GridNeedDataSourceEventArgs e)
{
    DataTable ds = new DataTable();
    RadGrid1.DataSource = addBlankLines(ds, num);
}
private DataTable addBlankLines(DataTable ds, int num)
{
    if (num != 0)
    {
        DataRow drBlank = default(DataRow);

        for (int i = 0; i < num; i++)
        {
            drBlank = ds.NewRow();
            ds.Rows.Add(drBlank);
        }
    }
    return ds;
}

Thanks,
Shinu.

[Caro]

Hi Shinu,

Thanks for your answer.
Your code had a few problems : The lines are added two by two on the grid and I don't know how to fill the blanks lines with my combobox selected values.

Caro

[Caro]

Up please :)

[Caro]

So ... I've find ...

ASP.NET :

<telerik:RadComboBox ID="MT" Runat="server"

            DataSourceID="MT_get"

            DataTextField="name"

            DataValueField="id" >
</telerik:RadComboBox>

                         

                         

 <telerik:RadButton ID="MTbutton"  runat="server" Text="Add" CausesValidation="true"  onclick="MTbutton_Click">

 </telerik:RadButton>

 

 <telerik:RadGrid ID="gridMT" runat="server" Visible="false">

 </telerik:RadGrid>

C# :

protected void MTbutton_Click(object sender, EventArgs e)
        {
            gridMT.Visible = true;
            DataTable ds = new DataTable();
            DataColumn colItem = new DataColumn("Name", Type.GetType("System.String"));
            ds.Columns.Add(colItem);
            DataRow NewRow;
            NewRow = ds.NewRow();
            NewRow["Name"] = MT.SelectedItem.Text;
            ds.Rows.Add(NewRow);
            gridMT.DataSource = ds;
            gridMT.DataBind();
        }

It works but each time I push the button "MTbutton" the old value is drop and we can see only the new value.
I want that each time I push the button, it add to the grid the new value but keep the old too ....

Could you help me to do that?

[Shinu]

Hi Caro,

Please check the following code snippet.

ASPX:

<asp:ScriptManager ID="scrpt" runat="server">
</asp:ScriptManager>
<telerik:RadComboBox ID="MT" runat="server" DataSourceID="SqlDataSource1" DataTextField="EmployeeID"
DataValueField="EmployeeID">
</telerik:RadComboBox>
<telerik:RadButton ID="MTbutton" runat="server" Text="Add" CausesValidation="true"
OnClick="MTbutton_Click">
</telerik:RadButton>
<telerik:RadGrid ID="gridMT" runat="server" Visible="false"
onneeddatasource="gridMT_NeedDataSource">
</telerik:RadGrid>

C#:

public static DataTable ds=new DataTable();
protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        Session["Table"] = null;
        DataColumn colItem = new DataColumn("Name", Type.GetType("System.String"));
        ds.Columns.Add(colItem);
    }
}
protected void MTbutton_Click(object sender, EventArgs e)
{
    gridMT.Rebind();
}
protected void gridMT_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
{
    gridMT.Visible = true;
    DataRow NewRow;
    NewRow = ds.NewRow();
    NewRow["Name"] = MT.SelectedItem.Text;
    ds.Rows.Add(NewRow);
    if (Session["Table"] != null)
    {
        ds = (DataTable)Session["Table"];
    }
    gridMT.DataSource = ds;//populate RadGrid with datatable
    Session["Table"] = ds;
}

Thanks,
-Shinu.

[Caro]

Hi Shinu

It works, thank you very much !!