我想顯示數據從數據庫到網格視圖與圖像文件。在使用下面給出的代碼時,它顯示一個錯誤。幫助我找到一個合適的解決方案。'Button1_Click'沒有超載與委託'System.EventHandler'匹配嗎?
代碼:
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中的按鈕? – ekad 2014-12-02 04:43:51
'Button_Click(Object sender,EventArgs e)' - 這是按鈕(從MSDN)的點擊處理程序的默認協議。您爲按鈕點擊事件處理程序提供的是'GridViewRowEventArgs'。你應該使用'EventArgs'嗎? – 2014-12-02 04:45:56
永遠不要忽視異常,除非是非常罕見的情況。並且不要忽略'NullReferenceException'。 – 2014-12-02 04:57:24