脚本代码: <script type="text/javascript">
<!--
function fnload()
{
alert('222');
//var imagestr=window.parent.dialogArguments;
ChaffMessage_UpLargeImage.GetImage('ddd');
}
-->
</script> 前台代码:<body onload ="fnload();">
<form id="form1" runat="server">
<div style="width:100%; height:100%; text-align:center; vertical-align:middle;">
<div style="width:100%;text-align:center; vertical-align:middle;">
<asp:Image ID="imgShow" runat="server" AlternateText="无图片显示" BorderWidth="0px" />
</div>
<div style="width:100%;text-align:center; vertical-align:middle;">
<input id="btnShut" type="button" value="button" />
</div>
</div>
<%--</ContentTemplate>
</asp:UpdatePanel>--%>
</form>
</body>cs代码: [AjaxPro.AjaxMethod]
public void GetImage(string str1)
{
string imagestr="http://localhost:16991/BSMS/ChaffMessage/GetTemporImg.aspx?ImID=424";
if (imagestr != string.Empty)
{
string imageid = imagestr.Remove(0, imagestr.LastIndexOf("=") + 1);
this.imgShow.ImageUrl = "GetTemporImg2.aspx?ImID=" +imageid.ToString();
}
}
}
出现错误的语句就是:this.imgShow.ImageUrl = "GetTemporImg2.aspx?ImID=" +imageid.ToString();GetTemporImg2.aspx页面的cs代码: protected void Page_Load(object sender, EventArgs e)
{
this.ShowImage();
}
TemporaryImg temporimg = new TemporaryImg();
TemporImgManage temporimgmng = new TemporImgManage(); private void ShowImage()
{
string imagestr = Request.QueryString["ImID"].ToString();
int imageid = Convert.ToInt16(imagestr); temporimg = temporimgmng.GetIamge(imageid);
Response.ContentType = "application/octet-stream";
Response.BinaryWrite(temporimg.ImageData);
}请各位帮忙看看,问题在哪
<!--
function fnload()
{
alert('222');
//var imagestr=window.parent.dialogArguments;
ChaffMessage_UpLargeImage.GetImage('ddd');
}
-->
</script> 前台代码:<body onload ="fnload();">
<form id="form1" runat="server">
<div style="width:100%; height:100%; text-align:center; vertical-align:middle;">
<div style="width:100%;text-align:center; vertical-align:middle;">
<asp:Image ID="imgShow" runat="server" AlternateText="无图片显示" BorderWidth="0px" />
</div>
<div style="width:100%;text-align:center; vertical-align:middle;">
<input id="btnShut" type="button" value="button" />
</div>
</div>
<%--</ContentTemplate>
</asp:UpdatePanel>--%>
</form>
</body>cs代码: [AjaxPro.AjaxMethod]
public void GetImage(string str1)
{
string imagestr="http://localhost:16991/BSMS/ChaffMessage/GetTemporImg.aspx?ImID=424";
if (imagestr != string.Empty)
{
string imageid = imagestr.Remove(0, imagestr.LastIndexOf("=") + 1);
this.imgShow.ImageUrl = "GetTemporImg2.aspx?ImID=" +imageid.ToString();
}
}
}
出现错误的语句就是:this.imgShow.ImageUrl = "GetTemporImg2.aspx?ImID=" +imageid.ToString();GetTemporImg2.aspx页面的cs代码: protected void Page_Load(object sender, EventArgs e)
{
this.ShowImage();
}
TemporaryImg temporimg = new TemporaryImg();
TemporImgManage temporimgmng = new TemporImgManage(); private void ShowImage()
{
string imagestr = Request.QueryString["ImID"].ToString();
int imageid = Convert.ToInt16(imagestr); temporimg = temporimgmng.GetIamge(imageid);
Response.ContentType = "application/octet-stream";
Response.BinaryWrite(temporimg.ImageData);
}请各位帮忙看看,问题在哪
1.因为你使用的是AjaxPro的框架,所以被标明 [AjaxPro.AjaxMethod]
的方法内是不能使用页面上的任何控件的,所以在GetImage()这个方法内根本无法调用imgShow这个控件,也不恩那个给它赋值
2.[AjaxPro.AjaxMethod]这种方法最好有返回值,不然它执行的错误与否,我们根本无法得知
3.看你代码,你大概是想做个验证码的东西,建议把GetTemporImg2.aspx这个页面使用ashx文件,这个输出图片更好,效率更高
后台this.imgshow这也能用
int imageid = Convert.ToInt16(imagestr);
是否有值