网页集成谷歌地图遇API密钥错误，请求技术协助排查

Hey there! Let’s work through why you’re still hitting that API key error even after adding it to your script tag. The Subgurim GMaps control has its own built-in way of handling the API key—just dropping it into a standalone script tag won’t connect it to the control itself. Here are the most reliable fixes to try:

1. Set the API Key Directly on the GMaps Control in Markup #

The simplest fix is to add the APIKey attribute right to your <cc1:GMaps> control in Default.aspx. This tells the control exactly which key to use when loading Google Maps.

Example:

<%@ Register Assembly="GMaps" Namespace="Subgurim.Controles" TagPrefix="cc1" %>

<cc1:GMaps ID="GMaps1" runat="server" 
    APIKey="your_actual_google_maps_api_key_here"
    Width="800px" Height="600px">
</cc1:GMaps>

2. Explicitly Set the Key in Code-Behind (Default.aspx.cs) #

If setting it in markup doesn’t resolve the issue, try explicitly defining the key in your page’s code-behind—preferably in the Page_Load event before the control renders:

protected void Page_Load(object sender, EventArgs e)
{
    // Assign the API key to the GMaps control
    GMaps1.APIKey = "your_actual_google_maps_api_key_here";
    
    // Your existing code to load database data onto the map...
}

3. Configure a Global Key in Web.config #

For a cleaner, project-wide solution (so you don’t have to set the key on every page), add it to your web.config as an app setting. The Subgurim control will automatically pick this value up:

<configuration>
  <appSettings>
    <add key="GMapsAPIKey" value="your_actual_google_maps_api_key_here" />
  </appSettings>
</configuration>

4. Verify Your API Key is Valid and Properly Configured #

Even if you set the key correctly, it might fail if:

• The key is disabled in your Google Cloud Console.
• You have referrer restrictions set that don’t match your website’s domain (or localhost if testing locally).
• The key doesn’t have the Maps JavaScript API enabled in Google Cloud Console.

Double-check these settings in your Google Cloud project to rule out any key-specific issues.

5. Remove Conflicting Manual Script Tags #

The Subgurim control automatically injects the Google Maps script tag with your API key. If you added a separate script tag for Google Maps manually, this could cause conflicts. Try removing any custom script tags you added for Google Maps—let the control handle loading the script itself.

Content of the question originates from Stack Exchange, asked by Vishal Gupta