itemdatabound小结

全栈程序员-用户IM • 2022年10月13日下午6:00 • 未分类

大家好，又见面了，我是你们的朋友全栈君。如果您正在找激活码,请点击查看最新教程,关注关注公众号 “全栈程序员社区” 获取激活教程,可能之前旧版本教程已经失效.最新Idea2022.1教程亲测有效,一键激活。

Jetbrains全系列IDE稳定放心使用
在DATAGRID中，如果要对某些记录进行格式化或者修饰，用到itemdatabound事件比较方便，

比如，要显示某人的存款金额已经少于某个数额了，要用红色来显示等。itemdatabound事件发生在

数据绑定到datagrid后，而其内容发送到客户端前。比如

private void OnItemDataBound(object sender,

        System.Web.UI.WebControls.DataGridItemEventArgs e)

{

    // Check if the current row contains items; if it’s

    // a header or footer row that will throw an error

    if (e.Item.ItemType == ListItemType.Item ||

        e.Item.ItemType == ListItemType.AlternatingItem)

    {

        // Get a copy of the “dgLabel2” label that contains the

        // “Balance” value

        Label lblBalance = (Label)e.Item.FindControl(“dgLabel2”);

        // Convert the value contained in the label to a double type

        double dblBalance = Convert.ToDouble(lblBalance.Text);

        // If that numeric value is negative

        if(dblBalance < 0)

            // …display it in red

            e.Item.Cells[3].ForeColor = System.Drawing.Color.Red;

        // Get a copy of the “dgLabel1” label that contains the

        // “Country” value

        Label lblCountry = (Label)e.Item.FindControl(“dgLabel1”);

        // …convert it to a string

        string strCountry = lblCountry.Text;

        // If it’s a North American country…

        if(strCountry == “USA” ||

            strCountry == “Mexico” ||

            strCountry == “Canada”)

        {

            // Get a copy of the “dgLabel0” label that contains the

            // “CustomerID” value, we’ll use it in the query string

            // for the popup

            Label lblID = (Label)e.Item.FindControl(“dgLabel0”);

            // …convert it to a string

            string strID = lblID.Text;

            // Replace the “Country” value displayed in the datagrid

            // with “Jamaica”, placed in a hyperlink who’s OnClick

            // event calls a javascript “popup” window

            e.Item.Cells[2].Text = “<a href=/”popup.aspx?id=” + strID +

                “/” onClick=/”popup(this.href); return false;/”>Jamaica</a>”;

        }

    }

}