Calling & Writing JavaScript Function from Server Side Code Behind
1: private void Page_Load(object sender, System.EventArgs e)
2: {
3: string jScriptValidator;
4: jScriptValidator="<script> function ReqFieldValidator()" +
5: " { if (document.forms[0].txtField.value == '') \n";
6: jScriptValidator+="{ alert('TextBox cannot be empty') \n ";
7: jScriptValidator+="return false; \n";
8: jScriptValidator+="} \n";
9: jScriptValidator+=" return true \n";
10: jScriptValidator+=" } </script>";
11: Page.RegisterStartupScript("regJSval",jScriptValidator);
12: btnSubmit.Attributes.Add("onclick","return ReqFieldValidator()");
13: }
Writing JavaScript Function in Server Side Code Behind and Calling from HTML
1: private void Page_Load(object sender, System.EventArgs e)
2: {
3: string jScript;
4: jScript="<script>function JavScriptFn(){alert" +
5: " ('Client Function in javascript is call')}</script>";
6: }
1: //HTML side
2: < A onclick="JavScriptFn()" >
3: < asp:Label id="Label1" runat="server" Width="281px"
4: ForeColor="#8080FF">Click to call Javascript function.
5: </asp:Label> >/A >
Writing JavaScript in HTML and Calling it from Code-behind
1: <Head >
2: <script>
3:
4: function ReqField1Validator()
5: {
6: if (document.forms[0].txtField1.value == '')
7: {
8: alert('TextBox cannot be empty')
9: return false
10: }
11: return true
12: }
13:
14: </script>
15: </Head >
1: private void Page_Load(object sender, System.EventArgs e)
2: {
3: btnOK.Attributes.Add("onclick","return ReqField1Validator()");
4: }
RegisterClientScriptBlock
1: private void btnClientBlock_Click(object sender, System.EventArgs e)
2: {
3: string jScript;
4: jScript="<script>alert ('Javascript block of code executed')</script>";
5: Page.RegisterClientScriptBlock("keyClientBlock",jScript);
6: lblSequencial.Text="Remaining part of the code executed";
7: }
ASP.NET 2.0 RegisterClientScriptBlock/RegisterStartupScript
1: <script>
2: function fnShowMessage()
3: {
4: alert(" Invoke Javascript function from Server Side Code Behind ");
5: }
6: </script>
1: protected void Button1_Click(object sender, EventArgs e)
2: {
3: ClientScript.RegisterStartupScript
4: (GetType(),"Javascript", "javascript: fnShowMessage(); ",true);
5: }
6: protected void Button2_Click(object sender, EventArgs e)
7: {
8: ClientScript.RegisterClientScriptBlock(GetType(), "Javascript",
9: "<script>alert('Record Added Successfully')</script>");
10: }
转载自：http://www.codeproject.com/KB/aspnet/ClientServer.aspx
