如果您不知道怎么做，您应该问服务提供商如何获得服务？找到它。

You should ask service provider how is service secured if you don't know how to find it.

您的网站似乎正在使用基本的HTTP身份验证。对于此类身份验证，您需要创建自定义 webHttpBinding 配置：

It looks like your site is using basic HTTP authentication. For such authentication you need to create custom webHttpBinding configuration:

<system.serviceModel>
  <client>
    <endpoint address="http://MyUrl/"
              binding="webHttpBinding"
              bindingConfiguration="secured"
              behaviorConfiguration="MyData"
              contract="MyNameSpace.MyIService"
              name="MyData"/>
  </client>
  <bindings>
    <webHttpBinding>
      <binding name="secured">
        <security mode="TransportCredentialOnly">
          <transport clientCredentialType="Basic" />
        </security>
      </binding>
    </webHttpBinding>
  </bindings>
  <behaviors>
    <endpointBehaviors>
      <behavior name="MyData">
        <webHttp/>
      </behavior>
    </endpointBehaviors>
  </behaviors>
</system.serviceModel>