[英]how to change text of label in asp.net dotnetnuke c# and display it on page?
我想在运行时使用标签在页面上显示错误消息。
因此,我完成了以下类型的代码。
protected void InsertButton_Click(object sender, EventArgs e)
{
//this.FormView1.Visible = false;
//LinkButton1.Text = "Update Successful - Add Another Page";
TextBox txtauthor = this.FormView1.FindControl("txtPageAuthor") as TextBox;
TextBox txttitle = this.FormView1.FindControl("txtPageTitle") as TextBox;
TextBox txttag = this.FormView1.FindControl("txtTagName") as TextBox;
Label lblAuthor = this.FormView1.FindControl("lblAuthor") as Label;
Label lblTitle = this.FormView1.FindControl("lblTitle") as Label;
Label lblTag = this.FormView1.FindControl("lblTag") as Label;
if (string.IsNullOrEmpty(txtauthor.Text))
{
lblAuthor.Text = "Author Name must be entered";
valid = 1;
}
if (string.IsNullOrEmpty(txttitle.Text))
{
lblTitle.Text = "Page Title must be entered";
valid = 1;
}
if (string.IsNullOrEmpty(txttag.Text))
{
lblTag.Text = "Tag Name must be entered";
valid = 1;
}
Page_Load(sender, e);
this.GridView1.DataBind();
}
// Page Load Event
public void Page_Load(object sender, EventArgs e)
{
Label lblAuthor = this.FormView1.FindControl("lblAuthor") as Label;
Label lblTitle = this.FormView1.FindControl("lblTitle") as Label;
Label lblTag = this.FormView1.FindControl("lblTag") as Label;
if (Page.IsPostBack)
{
//if (valid != 0)
//{
lblAuthor.Text = "Author Name must be entered";
lblTitle.Text = "Page Title must be entered";
lblTag.Text = "Tag Name must be entered";
//}
}
}
下面我提到了我的InsertButton的aspx代码:
<div class="lineheight">
<p style="display: inline; float: left; width: 100%">
<asp:Label ID="lblBlank" runat="server" Text=" " Width="100px" Style="float: left;"></asp:Label>
<asp:LinkButton ID="InsertButton" runat="server" CausesValidation="True" CommandName="Insert"
Text="Add Page" CssClass="btn" onclick="InsertButton_Click" />
<asp:LinkButton ID="InsertCancelButton" runat="server" CausesValidation="False"
CommandName="Cancel" Text="Cancel" CssClass="btn"
onclick="InsertCancelButton_Click" />
</p>
</div>
但是,每当我单击添加按钮时,整个页面都会重定向,并且标签的默认值即“”(空白)会打印在页面上。
我们欢迎所有答案。
提前致谢..
您可以使用ASP验证器 。 它们既好又简单,您也可以创建自定义验证器。 这是链接
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