User control issues

Swiftain

I have a user control with one gridview control on it and the code behind for the user control is shown below

protected void Page_Load(object sender, EventArgs e)
{
gvResults.DataSource = theSource;
gvResults.DataBind();
}

private List theSource;

public List<string> TheSource
{
    get { return theSource; }
    set { theSource = value; }
}

When I pass value to the control on the page load I works fine with the data being displayed on the grid as shown by the code below

protected void Page_Load(object sender, EventArgs e)
{
string[] myData = {"10", "20", "30"};
DataPager1.TheSource = myData.ToList();
}

But when I try to do the same thing by clicking a button, the page shows no data

protected void SearchButton_Click(object sender, EventArgs e)
{
string[] myData = {"10", "20", "30"};
DataPager1.TheSource = myData.ToList();
}

DataPager1 is the usercontrol ID. Any help will be appreciated.

thatraja

You need to rebind the gridview in SearchButton_Click.

thatraja |Chennai|India|

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Swiftain

But I don't have access to the gridview in SearchButton_Click I already tried DataPager1.DataBind(); and it didn't work

Hiren solanki

I tried it myself, but not success at all with that. I can provide you alternate way. Just change your SearchButton_Click event with following snippets.

protected void SearchButton_Click(object sender, EventArgs e)
{
string[] myData = {"10", "20", "30"};
//DataPager1.TheSource = myData.ToList();
GridView gview = (GridView)DataPager1.FindControl("gvResults");
gview.DataSource = myData;
gview.DataBind();
}

Regards, Hiren. Microsoft Dynamics CRM

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Swiftain

Thanks Hiren for your response, what you posted will work but the only problem is that I need to manipulate the data on the user control, not on the web page itself. So I just wanted a way to pass data from the web page unto the user control and then manipulate it from there. Funny thing is that it works on the Page_Load event but doesn't on the button_click event!

Hiren solanki

Swiftain wrote:

Funny thing is that it works on the Page_Load event but doesn't on the button_click event!

I've experimented a thing already with that, But didn't find any solution for the same, Let me try other way I will let you know once I got the clue. If you're finding the solution then please put here so that it could be useful further for a members and also me.

Regards, Hiren. Microsoft Dynamics CRM

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thatraja

Try

    gvResults.DataSource = theSource;
    gvResults.DataBind();

SearchButton_Click

thatraja |Chennai|India|

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Swiftain

I tried it, still no luck

thatraja

Swiftain wrote:

still no luck

I never believe that. what's the error message? mention that too.

thatraja |Chennai|India|

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Swiftain

There's no error message, it just displays blank. But like I said when the same code snippet is placed in the Page_Load event, it displays the data.

Hiren solanki

See THIS[^], It might be useful.

Regards, Hiren. Microsoft Dynamics CRM

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Swiftain

Instead binding the data on Page_Load event of the user control, I created a method for doing the same thing and it worked. I think the reason is because the Page_Load even of the user control fires and then that of the page fires too which happens automatically, so in order to force a bind, I had to create a simple method like this

public void BindData()
{
    gvResults.DataSource = TheSource;
    gvResults.DataBind();
}

and then on web page, I just did this

protected void SearchButton\_Click(object sender, EventArgs e)
{
    DataPager1.TheSource = myData.ToList();
    DataPager1.BindData();
}

Now that works, but now it looks as though the gridview events from the user control like "OnRowCreated" ain't firing. Oh well, at least I've got one bit working :)

Hiren solanki

Yes, That's the way. Thanks for sharing solution.

Swiftain wrote:

"OnRowCreated" ain't firing

Will try to solve it as getting enough time. :)

Regards, Hiren.

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