单击按钮时从代码隐藏调用 Javascript 函数
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Call Javascript function from codebehind on button click
提问by Hymaney
I want to execute a javascript function on a button click and if the result is a sucess only then the server side code should be executed on that button click.
我想在单击按钮时执行 javascript 函数，如果结果是成功，则应在单击该按钮时执行服务器端代码。
Below is what I am trying to do
以下是我正在尝试做的
protected void btnAdd_Click(object sender, EventArgs e)
{
if (btnAddItem.Text == "Add")
{
string script = string.Format(@"validate()");
ScriptManager.RegisterClientScriptBlock(this, typeof(Page), UniqueID, script, true);
if (text1.text== null)
{
Addtogrid();
}
and below is my javascript function
下面是我的javascript函数
function validate() {
var arrTextBox = document.getElementsByTagName("input");
var retVal = 1;
for (i = 0; i < arrTextBox.length; i++) {
if (arrTextBox[i].type == "text" && arrTextBox[i].value == "") {
retVal = 0;
}
}
if (retVal == 0) {
alert("Validation Failed");
return false;
}
else {
alert("Validation Success");
return true;
}
}
I am not able to understand how to capture of the result of the javascript function . I am trying this for the first time. Kindly help me.
我无法理解如何捕获 javascript 函数的结果。我是第一次尝试这个。请帮助我。
回答by Ronnie
I think the simplest way is to set up the validation function to be called on button click in your markup. So your markup should look like the following..
我认为最简单的方法是设置要在标记中单击按钮时调用的验证函数。所以你的标记应该如下所示..
<asp:Button runat="server" ID="btnAdd" Text="My Button" OnClientClick="return validate()" OnClick="btnAdd_Click" />
Note the OnClientClick attribute. You can use that attribute to call a javascript function that executes before the server side code.
请注意 OnClientClick 属性。您可以使用该属性来调用在服务器端代码之前执行的 javascript 函数。
回答by Kanishka
The following way u can call javascript function after server side operation
服务器端操作后，您可以通过以下方式调用javascript函数
<script language="JavaScript" type="text/javascript">
function validate(msg) {
alert(msg);
}
</script>
<asp:Button ID="btnValidateUSR" runat="server" Text="Validate USR" CssClass="butn" OnClick="btnValidateUSR_Click"/>
protected void btnValidateUSR_Click(object sender, EventArgs e)
{
ClientScriptManager cs = Page.ClientScript;
cs.RegisterStartupScript(this.GetType(), "ValError", "validate('" +Resources.ErrorDescription.BalancingErrorMsg+ "');", true);
}
