光标在IE10浏览器中TextBox乱跳

[暖暖的秒]

我用DropDownList和TextBox组合实现一个可选可写的下拉列表，TextBox叠在DropDownList的上面。在IE10中运行，当我选中DropDownList的某一项，该项的内容显示TextBox里面，然后点击TextBox，光标先是出现在TextBox文本的末尾，闪一下光标出现在TextBox文本的开头。在IE8中运行不会出现这种情况，鼠标点在文本的哪个位置，光标就一直在那个位置闪烁。 各位大神帮帮小弟吧

[bigbaldy]

也许是浏览器兼容性问题吧，你试试在你的工程中新建一个App_Browsers目录，里面建一个文件ie.browser,内容如下，可以兼容IE6-11，保证服务器控件不出问题

<browsers>
    <!-- Mozilla/5.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4325) -->
    <browser id="IE6Plus" parentID="IE">
        <identification>
            <capability name="majorversion" match="^[6-9]|\d{2,}$" />
        </identification>

        <capabilities>
            <capability name="ecmascriptversion"    value="3.0" />
            <capability name="jscriptversion"       value="5.6" />
            <capability name="javascript"           value="true" />
            <capability name="javascriptversion"    value="1.5" />
            <capability name="msdomversion"         value="${majorversion}.${minorversion}" />
            <capability name="w3cdomversion"        value="1.0" />
            <capability name="ExchangeOmaSupported" value="true" />
            <capability name="activexcontrols"      value="true" />
            <capability name="backgroundsounds"     value="true" />
            <capability name="cookies"              value="true" />
            <capability name="frames"               value="true" />
            <capability name="javaapplets"          value="true" />
            <capability name="supportsCallback"     value="true" />
            <capability name="supportsFileUpload"   value="true" />
            <capability name="supportsMultilineTextBoxDisplay" value="true" />
            <capability name="supportsMaintainScrollPositionOnPostback" value="true" />
            <capability name="supportsVCard"        value="true" />
            <capability name="supportsXmlHttp"      value="true" />
            <capability name="tables"               value="true" />
            <capability name="supportsAccessKeyAttribute"    value="true" />
            <capability name="tagwriter"            value="System.Web.UI.HtmlTextWriter" />
            <capability name="vbscript"             value="true" />
        </capabilities>
    </browser>

    <!-- Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0;) -->
    <browser id="IE6to9" parentID="IE6Plus">
      <identification>
        <capability name="majorversion" match="^[6-9]$" />
      </identification>
    </browser>

    <!-- Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0;) -->
    <browser id="IE7" parentID="IE6to9">
        <identification>
            <capability name="majorversion" match="^7$" />
        </identification>
        <capabilities>
            <capability name="jscriptversion" value="5.7" />
        </capabilities>
    </browser>

    <!-- Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729) -->
    <browser id="IE8" parentID="IE6to9">
        <identification>
            <capability name="majorversion" match="^8$" />
        </identification>
        <capabilities>
            <capability name="jscriptversion" value="6.0" />
        </capabilities>
    </browser>

  <!-- Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729) -->
  <browser id="IE9" parentID="IE6to9">
    <identification>
      <capability name="majorversion" match="^9$" />
    </identification>
    <capabilities>
      <capability name="jscriptversion" value="6.0" />
    </capabilities>
  </browser>


  <browser id="IE11" parentID="Mozilla">
    <identification>
      <userAgent match="Trident\/7.0; rv:(?'version'(?'major'\d+)(\.(?'minor'\d+)?)(?'letters'\w*))(?'extra'[^)]*)" />
      <userAgent nonMatch="IEMobile" />
    </identification>
    <capture>
      <userAgent match="Trident/(?'layoutVersion'\d+)" />
    </capture>
    <capabilities>
      <capability name="browser"              value="IE" />
      <capability name="layoutEngine"         value="Trident" />
      <capability name="layoutEngineVersion"  value="${layoutVersion}" />
      <capability name="extra"                value="${extra}" />
      <capability name="isColor"              value="true" />
      <capability name="letters"              value="${letters}" />
      <capability name="majorversion"         value="${major}" />
      <capability name="minorversion"         value="${minor}" />
      <capability name="screenBitDepth"       value="8" />
      <capability name="type"                 value="IE${major}" />
      <capability name="version"              value="${version}" />
    </capabilities>
  </browser>

  <!-- Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11,0) like Gecko -->
  <browser id="IE110" parentID="IE11">
    <identification>
      <capability name="majorversion" match="11" />
    </identification>

    <capabilities>
      <capability name="ecmascriptversion"    value="3.0" />
      <capability name="jscriptversion"       value="5.6" />
      <capability name="javascript"           value="true" />
      <capability name="javascriptversion"    value="1.5" />
      <capability name="msdomversion"         value="${majorversion}.${minorversion}" />
      <capability name="w3cdomversion"        value="1.0" />
      <capability name="ExchangeOmaSupported" value="true" />
      <capability name="activexcontrols"      value="true" />
      <capability name="backgroundsounds"     value="true" />
      <capability name="cookies"              value="true" />
      <capability name="frames"               value="true" />
      <capability name="javaapplets"          value="true" />
      <capability name="supportsCallback"     value="true" />
      <capability name="supportsFileUpload"   value="true" />
      <capability name="supportsMultilineTextBoxDisplay" value="true" />
      <capability name="supportsMaintainScrollPositionOnPostback" value="true" />
      <capability name="supportsVCard"        value="true" />
      <capability name="supportsXmlHttp"      value="true" />
      <capability name="tables"               value="true" />
      <capability name="supportsAccessKeyAttribute"    value="true" />
      <capability name="tagwriter"            value="System.Web.UI.HtmlTextWriter" />
      <capability name="vbscript"             value="true" />
    </capabilities>
  </browser>

  <!-- Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0) -->
  <browser id="IE10Plus" parentID="IE6Plus">
    <identification>
      <capability name="majorversion" match="\d{2,}" />
    </identification>
    <capabilities>
      <capability name="jscriptversion" value="6.0" />
    </capabilities>
  </browser>

  <gateway id="IEbeta" parentID="IE">
        <identification>
            <capability name="letters" match="^([bB]|ab)" />
        </identification>

        <capture>
        </capture>

        <capabilities>
            <capability name="beta"    value="true" />
        </capabilities>
    </gateway>
</browsers>

[暖暖的秒]

试了一下没有任何改变，将TextBox单独出来，点击TextBox文本的哪个位置，光标就出现在哪里，但是TextBox和DropDownList放到UpdatePanel控件中，每次点击TextBox的文本，光标总会先出现在文本的末尾，然后停留在文本的开头

[暖暖的秒]

自己解决了，我把DropDownList和TextBox的position属性一个设置为inherit，一个设置为absolute就搞定了。