how to change text of label in asp.net dotnetnuke c# and display it on page? -


i want put error messages on page @ runtime using labels.

so have done following type of code.

protected void insertbutton_click(object sender, eventargs e) {     //this.formview1.visible = false;     //linkbutton1.text = "update successful - add page";     textbox txtauthor = this.formview1.findcontrol("txtpageauthor") textbox;     textbox txttitle = this.formview1.findcontrol("txtpagetitle") textbox;     textbox txttag = this.formview1.findcontrol("txttagname") textbox;     label lblauthor = this.formview1.findcontrol("lblauthor") label;     label lbltitle = this.formview1.findcontrol("lbltitle") label;     label lbltag = this.formview1.findcontrol("lbltag") label;      if (string.isnullorempty(txtauthor.text))     {         lblauthor.text = "author name must entered";         valid = 1;     }     if (string.isnullorempty(txttitle.text))     {         lbltitle.text = "page title must entered";         valid = 1;     }     if (string.isnullorempty(txttag.text))     {         lbltag.text = "tag name must 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") label;     label lbltitle = this.formview1.findcontrol("lbltitle") label;     label lbltag = this.formview1.findcontrol("lbltag") label;      if (page.ispostback)     {         //if (valid != 0)         //{         lblauthor.text = "author name must entered";         lbltitle.text = "page title must entered";         lbltag.text = "tag name must entered";         //}     } }

below have mentioned insertbutton's aspx code:

<div class="lineheight">                 <p style="display: inline; float: left; width: 100%">                     <asp:label id="lblblank" runat="server" text="&nbsp" 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" />                     &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <asp:linkbutton id="insertcancelbutton" runat="server" causesvalidation="false"                         commandname="cancel" text="cancel"  cssclass="btn"                          onclick="insertcancelbutton_click" />     </p>     </div>

but everytime click add button whole page redirected , default value of label i.e. "" (blank) printed on page.

all answers warmly welcome..

thanks in advance..

you can use asp validators. , more simpler, , can make custom validators. here link


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