How to Get and Set Value of HTML control from CodeBehind in ASP.Net?
Sometimes, there may be scenarios where we need to access a HTML control from codebehind file. An easy way to do that is by replacing it with a server control or including runat="server" attribute. By doing like this, it is possible to set and get values of those controls from codebehind file. Refer below,
<input id="txtDesc" runat="server" name="txtDesc" type="text" />
txtDesc.Value = "New Value!!";
If you still want to get or set values to HTML controls without runat="server" then you can use Request.Form collection to get the value. You can use public property and embedded code blocks to set the value from server. Refer the code below,
<input id="txtDesc1" name="txtDesc1" type="text" value="Set in Client Side" />
<input id="txtDesc2" name="txtDesc2" type="text" value="<% =ServerValue %>" />
public string ServerValue = String.Empty;
protected void btnSave_Click(object sender, EventArgs e)
string ClientValue = Request.Form["txtDesc1"];
ServerValue = "Set in Server";
In the above code, txtDesc1 value that is set from client side is accessed in server using Request.Form collection and the field txtDesc2 value is set from the server using a public property and embedded code expressions.