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Adding checkbox to datagrid headersCan anyone help me with this.
I have a datagrid on a page which is used to show different views from SQL-Server. With autogenerate columns, this works fine for me. But now I want a checkbox before every caption in the header. With this checkbox I'm goint to determine if the user wants that field in his/her final print or export. I'm able to add the checkbox on designtime by using Itemtemplates, but I can not get this to work on runtime. Thanks in advance Hi Victor,
Shouldn't you be adding the checkbox control in the <HeaderTemplate></HeaderTemplate> instead of <ItemTemplate>? then in the ItemDataBound event of the datagrid, write: public void DataGrid1_ItemDataBound(object sender, DataGridItemEventArgs e) { if (e.Item.ItemType == ListItemType.Header) { CheckBox myCheckbox = (CheckBox)e.Item.FindControl("CheckBox1"); if (myCheckbox != null) { // Inject clientside click event to capture the checkbox's value and put it into a hidden field txtColumnSelected myCheckbox.Attributes.Add("onclick", "document.all.txtColumnSelected.value = " + myCheckbox.checked); } } } Hope that's what you're looking for. Calvin. Show quote "Victor Heijke" wrote: > Can anyone help me with this. > I have a datagrid on a page which is used to show different views from > SQL-Server. > With autogenerate columns, this works fine for me. But now I want a checkbox > before every caption in the header. With this checkbox I'm goint to determine > if the user wants that field in his/her final print or export. > > I'm able to add the checkbox on designtime by using Itemtemplates, but I can > not get this to work on runtime. > > Thanks in advance Thanks for your reaction, you are right.
I'm not even able to add the items to the header on runtime. If I use something like this in ItemDataBound Dim chkBox As CheckBox Try If e.Item.ItemType = ListItemType.Header Then chkBox = New CheckBox e.Item.Controls.Add(chkBox) End If Catch ex As Exception Response.Write(ex.Message) End Try than I get a 'TableRow' cannot have children of type 'CheckBox'. error Any ideas? Victor Show quote "Calvin KD" wrote: > Hi Victor, > Shouldn't you be adding the checkbox control in the > <HeaderTemplate></HeaderTemplate> instead of <ItemTemplate>? then in the > ItemDataBound event of the datagrid, write: > public void DataGrid1_ItemDataBound(object sender, DataGridItemEventArgs e) > { > if (e.Item.ItemType == ListItemType.Header) > { > CheckBox myCheckbox = (CheckBox)e.Item.FindControl("CheckBox1"); > if (myCheckbox != null) > { > // Inject clientside click event to capture the checkbox's value > and put it into a hidden field txtColumnSelected > myCheckbox.Attributes.Add("onclick", > "document.all.txtColumnSelected.value = " + myCheckbox.checked); > } > } > } > > Hope that's what you're looking for. > Calvin. > > "Victor Heijke" wrote: > > > Can anyone help me with this. > > I have a datagrid on a page which is used to show different views from > > SQL-Server. > > With autogenerate columns, this works fine for me. But now I want a checkbox > > before every caption in the header. With this checkbox I'm goint to determine > > if the user wants that field in his/her final print or export. > > > > I'm able to add the checkbox on designtime by using Itemtemplates, but I can > > not get this to work on runtime. > > > > Thanks in advance Hi Victor,
First of all, I'd like to establish that you're using .Net Framework 1.1 aren't you? because my solution only works with 1.1, not 2.0. OK, I always use an HTML Table rather than the Webcontrol table. Here's what i do: <asp:DataGrid ...> <HeaderTemplate> <Table id="..." ... runat="server"> <tr> <td width="10%"><asp:CheckBox id="CheckBox1" ...> Column1 Header</td> <td width="10%"><asp:CheckBox id="CheckBox2" ...> Column2 Header</td> ... </tr> </Table> </HeaderTemplate> </asp:DataGrid> The check boxes are created at design time rather than at runtime. Once that's done, use the solution that i previously proposed to try and obtain the values from those checkboxes. Let me know if still have problems. More than happy to help you out. Cheers, Calvin Show quote "Victor Heijke" wrote: > Thanks for your reaction, you are right. > I'm not even able to add the items to the header on runtime. > If I use something like this in ItemDataBound > > Dim chkBox As CheckBox > Try > > If e.Item.ItemType = ListItemType.Header Then > chkBox = New CheckBox > e.Item.Controls.Add(chkBox) > End If > Catch ex As Exception > Response.Write(ex.Message) > End Try > > than I get a 'TableRow' cannot have children of type 'CheckBox'. error > > Any ideas? > > Victor > > "Calvin KD" wrote: > > > Hi Victor, > > Shouldn't you be adding the checkbox control in the > > <HeaderTemplate></HeaderTemplate> instead of <ItemTemplate>? then in the > > ItemDataBound event of the datagrid, write: > > public void DataGrid1_ItemDataBound(object sender, DataGridItemEventArgs e) > > { > > if (e.Item.ItemType == ListItemType.Header) > > { > > CheckBox myCheckbox = (CheckBox)e.Item.FindControl("CheckBox1"); > > if (myCheckbox != null) > > { > > // Inject clientside click event to capture the checkbox's value > > and put it into a hidden field txtColumnSelected > > myCheckbox.Attributes.Add("onclick", > > "document.all.txtColumnSelected.value = " + myCheckbox.checked); > > } > > } > > } > > > > Hope that's what you're looking for. > > Calvin. > > > > "Victor Heijke" wrote: > > > > > Can anyone help me with this. > > > I have a datagrid on a page which is used to show different views from > > > SQL-Server. > > > With autogenerate columns, this works fine for me. But now I want a checkbox > > > before every caption in the header. With this checkbox I'm goint to determine > > > if the user wants that field in his/her final print or export. > > > > > > I'm able to add the checkbox on designtime by using Itemtemplates, but I can > > > not get this to work on runtime. > > > > > > Thanks in advance  |
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