我想显示数据从数据库到网格视图与图像文件。在使用下面给出的代码时,它显示一个错误。帮助我找到一个合适的解决方案。'Button1_Click'没有超载与委托'System.EventHandler'匹配吗?
代码:
protected void Button1_Click(object sender, GridViewRowEventArgs e1)
{
ShadingAnalysisDataSetTableAdapters.tbl_SiteLayOutUploadTableAdapter sl;
sl = new ShadingAnalysisDataSetTableAdapters.tbl_SiteLayOutUploadTableAdapter();
DataTable dt = new DataTable();
dt = sl.GetGridData(ddlSit.SelectedValue, int.Parse(ddlVersion.SelectedValue));
try
{
if (e1.Row.RowType == DataControlRowType.DataRow && gvEdit.EditIndex == e1.Row.RowIndex)
{
Image Image1 = (Image)e1.Row.FindControl("Image1");
foreach (DataRow row in dt.Rows)
{
byte[] img1 = (byte[])row["ImgData"];
string base1 = Convert.ToBase64String(img1);
Image1.ImageUrl = "data:image/jpg;base64," + base1;
}
}
gvEdit.DataSource = dt;
gvEdit.DataBind();
}
catch (NullReferenceException ex)
{
}
}
ASPX:
<asp:Button ID="Button1" runat="server" Text="Submit" OnClick="Button1_Click" />
GridView中的按钮? – ekad 2014-12-02 04:43:51
'Button_Click(Object sender,EventArgs e)' - 这是按钮(从MSDN)的点击处理程序的默认协议。您为按钮点击事件处理程序提供的是'GridViewRowEventArgs'。你应该使用'EventArgs'吗? – 2014-12-02 04:45:56
永远不要忽视异常,除非是非常罕见的情况。并且不要忽略'NullReferenceException'。 – 2014-12-02 04:57:24