ASP.NET

arkiboys26-Jan-10 22:20

26-Jan-10 22:20

I have the following code inside the grid_RowdataBound event. Do I have to delete it and use your code instead?

//Sources dropdown in gridview...
DropDownList ddlgvSources = (DropDownList)e.Row.FindControl("ddlgvSources");
PopulateSourcesGridView(ddlgvSources);
ddlSources.SelectedIndex = ddlgvSources.Items.IndexOf(ddlgvSources.Items.FindByValue(DataBinder.Eval(e.Row.DataItem, "SourceName").ToString()));

Pranay Rana26-Jan-10 22:33

26-Jan-10 22:33

no need to delete its fine i think it should work.

but i have problem with this line

ddlSources.SelectedIndex = ddlgvSources.Items.IndexOf(ddlgvSources.Items.FindByValue(DataBinder.Eval(e.Row.DataItem, "SourceName").ToString()));

instead of above line you use below one because you are searching with find by value

ddlSources.SelectedValue= ddlgvSources.Items.IndexOf(ddlgvSources.Items.FindByValue(DataBinder.Eval(e.Row.DataItem, "SourceName").ToString()));

arkiboys26-Jan-10 22:38

26-Jan-10 22:38

error is:
Cannot implicitly convert type 'int' to 'string'

To help you find the cause here is what I have at present:

protected void grid_RowDataBound(object sender, GridViewRowEventArgs e)
{
//Sources dropdown in gridview...
DropDownList ddlgvSources = (DropDownList)e.Row.FindControl("ddlgvSources");
PopulateSourcesGridView(ddlgvSources);
//ddlSources.SelectedIndex = ddlgvSources.Items.IndexOf(ddlgvSources.Items.FindByValue(DataBinder.Eval(e.Row.DataItem, "SourceName").ToString()));
ddlSources.SelectedValue = ddlgvSources.Items.IndexOf(ddlgvSources.Items.FindByValue(DataBinder.Eval(e.Row.DataItem, "SourceName").ToString()));

}

//populate the dropdown list of the Sources in the GridView...
private void PopulateSourcesGridView(DropDownList ddl)
{
string strSourceID;
string strName;
int intSources;

DataTable dtSources = clsAccess.SourcesGet();
intSources = dtSources.Rows.Count;

ddl.Items.Clear();
for (int i = 0; i < intSources; i++)
{
strSourceID = dtSources.Rows[i]["SourceID"].ToString();
strName = dtSources.Rows[i]["SourceName"].ToString();

ddl.Items.Add(new ListItem(strName, strSourceID));
}
}
//////////////////////////////////
<EditItemTemplate>
<asp:DropDownList ID="ddlgvSources" runat="server" SelectedValue='<%# Eval("SourceName") %>'>
</asp:DropDownList>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label3" runat="server" Text='<%# Bind("SourceName") %>'></asp:Label>
</ItemTemplate>

Pranay Rana26-Jan-10 23:02

26-Jan-10 23:02

ddlSources.SelectedValue = ddlgvSources.Items.IndexOf(ddlgvSources.Items.FindByValue(DataBinder.Eval(e.Row.DataItem, "SourceName").ToString()));

Replace above line of code with following line

ListItem li= ddlSources.Items.FindByValue(DataBinder.Eval(e.Row.DataItem, "SourceName").ToString());

li.Selected = true;

arkiboys26-Jan-10 23:10

26-Jan-10 23:10

On clicking the edit of the row which fires the event grid_RowEditing(object sender, GridViewEditEventArgs e)
then the grid is repopulated and so on grid.databind the error is:
'ddlgvSources' has a SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value

Any thoughts?

Pranay Rana26-Jan-10 23:14

26-Jan-10 23:14

this may work

ddlgvSources.ClearSelection()

put this line of code before you are going to select list item

arkiboys26-Jan-10 23:20

26-Jan-10 23:20

Not sure what you mean because I click on the edit only without doing any changes and the error occurs just before the repopulation of the grid.
And where do you mean I should put this code exactly please?

Pranay Rana26-Jan-10 23:28

26-Jan-10 23:28

According to me when you are clicking edit of that grid its selecting vlaue in dropdown box again some how so according to me you just clear selection of the dropdown box before going to select for item in it

arkiboys26-Jan-10 23:56

26-Jan-10 23:56

Apologies but not sure where exactly in the code you want me to put this...

Anyway, In the grid the cell has a text value and so does the droop down. I would like to match the dropdowntext with the text in the cell of the grid.
So this is what I am doing but the selected text is not selected in the droopdown. Do you see why?

ddlgvSources.SelectedValue = ddlgvSources.Items.IndexOf(ddlgvSources.Items.FindByValue(DataBinder.Eval(e.Row.DataItem, "SourceName").ToString())).ToString();

arkiboys27-Jan-10 0:18

27-Jan-10 0:18

I am breaking down the result so hoopefully it helps you more:
DataBinder.Eval(e.Row.DataItem, "SourceName").ToString()
returns
"Isor"

ddlgvSources.Items.FindByValue(DataBinder.Eval(e.Row.DataItem, "SourceName").ToString())
returns
null

ddlgvSources.Items.IndexOf(ddlgvSources.Items.FindByValue(DataBinder.Eval(e.Row.DataItem, "SourceName").ToString()))
returns
-1

please note that I would like the text "isor" to be selected in the dropdown

arkiboys27-Jan-10 21:44

27-Jan-10 21:44

solved by using findbytext.
Thank you

GridView

arkiboys26-Jan-10 4:50

26-Jan-10 4:50

Hi,
I am unable to retrieve the cell value of the selected row.
The column is set to readonly=true and visible=false

In the grid_rowupdating event

This should be referring to the 2nd coluomn in the grid.
string strValue = ((TextBox)grid.Rows[e.RowIndex].Cells[1].Controls[0]).Text;

The error is:
Specified argument was out of the range of valid values.
Parameter name: index

Any thoughts please?
Thanks

Re: GridView

Not Active26-Jan-10 5:22

Not Active

26-Jan-10 5:22

You've marked it as visible=false so the column won't render and thus will not be available.

You may want to look here, and elsewhere, for some tips and ideas
DataGridDemo[^]

I know the language. I've read a book. - _Madmatt

Re: GridView

arkiboys26-Jan-10 10:07

dropdowncontrol in Gridview asp.net 3.5 [modified]

26-Jan-10 10:07

solved.
I am using a template and yet it is still invisible which is fine.
Thanks

arkiboys26-Jan-10 3:32

Re: dropdowncontrol in Gridview asp.net 3.5

26-Jan-10 3:32

hi,
I have managed to put a dropdown control inside a GridView for each row.
How do i populate the dropdownlist control with the required data?

Thanks

modified on Tuesday, January 26, 2010 10:18 AM

arkiboys26-Jan-10 5:09