I am working with an input variable that is being modified using JavaScript on the client side:
<input type="text" id="field1" value="Sunday, July 30th in the Year 1967 CE" />
What is the best way for me to utilize the input value and write it to the database when a click event occurs in my code-behind?
To avoid using
<input type="text" id="field1" value="Sunday, July 30th in the Year 1967 CE" />
Replace it with
<asp:TextBox runat="server" ID="txtDate"></asp:TextBox>
Then assign a value in JavaScript like this:
document.getElementById('<%=txtDate.ClientID%>').value
Next, retrieve the value in the code behind
txtDate.Text
This question covers a wide range of topics, but in essence, adding runat="server" to the input allows you to access its value in the code-behind:
<input type="text" id="field1" runat="server" value="Sunday, July 30th in the Year 1967 CE" />
In the code-behind:
protected void Button1_Click(object sender, EventArgs e)
{
// Retrieve the value and implement saving logic here
string val = field1.Value;
}
It's worth noting that once you've added runat="server" to the input, in JavaScript, you will need to refer to the control using its ClientID:
var el = document.getElementById("<%= field1.ClientID %>");
if (el){
el.value = "foo";
}
An easy method for obtaining information from a Client is by utilizing the <input> within a <form> element with the method attribute configured as POST. This enables retrieval of data from the <input> within the form collection during postback.
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