using datalist to retrieve data

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We are reading pictures from the database using datalist and stored in a image button.
we want to get the id of the picture when you click on which ever image button, the controls you use inside the datalist itemtemplate aren't recognised in the code section.
is there anyway you can help?

Posted 26-Sep-11 5:43am

sthembiso12

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Joe Doc Sr · Answer 1 · 2011-09-26T10:51:00

This is a realy simple way to do it.
When you click on an image the postback will fire and in the top right hand corner of the page you will see the image id.

Here is the HTML that I used.
Paste this in your designer.

XML

<asp:DataList ID="dlImages" runat="server" DataKeyField="imageID" RepeatColumns="3" RepeatDirection="Horizontal" >
        <ItemTemplate>
            <asp:ImageButton ID="ibImages" runat="server"
                ImageUrl='<%# Eval("ImagePath") %>' CommandArgument='<%# Eval("ImageID") %>'
                onclick="ibImages_Click" />
        </ItemTemplate>

paste this code in your code behind.

private List<Images> listOfImages = new List<Images>();

protected void Page_Load(object sender, System.EventArgs e)
{
	if (!IsPostBack) {
		LoadImages();
		this.dlImages.DataSource = listOfImages;
		this.dlImages.DataBind();
	}


}


private void LoadImages()
{
	for (i = 1; i <= 10; i++) {
		Images newImage = new Images();
		newImage.ImageID = i;

		switch (i) {
			case 1:
			case 3:
			case 5:
			case 7:
			case 9:
				newImage.ImagePath = ADD YOUR IMAGE PATH HERE;

				break;
			case 2:
			case 4:
			case 6:
			case 8:
			case 10:
				newImage.ImagePath = ADD YOUR IMAGE PATH HERE;
				break;

		}
		listOfImages.Add(newImage);

	}
}

public class Images
{
	private int _imageID;
	public int ImageID {
		get { return _imageID; }
		set { _imageID = value; }
	}

	private string _imagePahh;
	public string ImagePath {
		get { return _imagePahh; }
		set { _imagePahh = value; }
	}


}

private void dlImages_SelectedIndexChanged(object sender, System.EventArgs e)
{
	Response.Write("IMAGE ID = ");
}

protected void ibImages_Click(object sender, System.Web.UI.ImageClickEventArgs e)
{
	Response.Write("IMAGE ID = " + ((ImageButton)sender).CommandArgument);
}