Ajax should pay attention to whether there is. ashx extension in IIS
A local web Program Put it in the <span href = "http://www.im286.com/tag.php? Name = % B7 % Fe % Ce % F1 % C6 % F7 "class =" t_tag "> server </span>. The web program uses ajax to round-trip data. <Br/> check the generated HTML statement. Code <Font style = "font-size: 13px "> <font color =" # 0000ff "> & lt; </font> <font color = "#800000"> script </font> <font color = "# ff0000"> type </font> <font color = "# 0000ff" >=& quot; text/JavaScript & quot; </font> <font color = "# ff0000"> SRC </font> <font color = "# 0000ff" >=& quot; /Cargo/csharpwrapper/Common. ashx & quot; </font> <font color = "# 0000ff"> & Gt; & lt;/</font> <font color = "#800000"> script </font> <font color = "# 0000ff"> & gt; </font> <font color = "#000000"> <br/> <br/> & nbsp; & nbsp; </font> <font color = "# 0000ff"> & lt; </font> <font color = "#800000"> script </font> <font color = "# ff0000"> T Ype </font> <font color = "# 0000ff" >=& quot; text/JavaScript & quot; </font> <font color = "# ff0000"> SRC </font> <font color = "# 0000ff" >=& quot;/Cargo/csharpwrapper/SD. supercargo. webapp. forms. productinfoajax, SD. supercargo. webapp. ashx & quot; </font> <font color = "# 0000ff"> & gt; & lt; /</font> <font color = "#800000"> script </font> <font color = "# 0000ff"> & gt; </font> <font color = "#000000"> <br/> </font> <br/> that is, Ajax should be up. Check that no parent application exists in the directory where the application is located. Check the IIS extension. There is no. ashx extension on the server. This is probably the problem. Add <br/> select an application, property-> virtual directory-> Configuration-> ing-> Add <br/> Save and exit, everything works.