Javascript运行时错误：'__dopostback'未定义 [英] Javascript runtime error: '__dopostback' is undefined
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问题描述
我使用网格视图使用asp.net c＃显示数据库中的数据。我已经启用了网格视图的编辑和删除选项，但是一旦我点击编辑或删除按钮系统显示如下错误
JavaScript运行时错误：'__ doPostBack'是undefined
我的尝试：
asp.net
i am using grid view to show data from the database using asp.net c#. i have enabled edit and delete options of the grid view but once i click on the edit or delete button system is showing below error
JavaScript runtime error: '__doPostBack' is undefined
What I have tried:
asp.net
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
DataKeyNames="serial_no" OnPageIndexChanging="GridView1_PageIndexChanging"
OnRowCancelingEdit="GridView1_RowCancelingEdit"
OnRowDeleting="GridView1_RowDeleting" OnRowEditing="GridView1_RowEditing"
OnRowUpdating="GridView1_RowUpdating">
<columns>
<asp:BoundField DataField="serial_no" HeaderText="serial_no"
InsertVisible="False" ReadOnly="True" SortExpression="serial_no" />
<asp:BoundField DataField="internal_receiving" HeaderText="internal_receiving"
SortExpression="internal_receiving" />
<asp:BoundField DataField="date" HeaderText="date" SortExpression="date" />
<asp:BoundField DataField="department" HeaderText="department"
SortExpression="department" />
<asp:BoundField DataField="department_type" HeaderText="department_type"
SortExpression="department_type" />
<asp:BoundField DataField="organization" HeaderText="organization"
SortExpression="organization" />
<asp:BoundField DataField="organization_type" HeaderText="organization_type"
SortExpression="organization_type" />
<asp:BoundField DataField="file_no" HeaderText="file_no"
SortExpression="file_no" />
<asp:BoundField DataField="subject" HeaderText="subject"
SortExpression="subject" />
<asp:BoundField DataField="file_name" HeaderText="file_name"
SortExpression="file_name" />
<asp:BoundField DataField="status" HeaderText="status"
SortExpression="status" />
<asp:CommandField ShowEditButton="true" />
<asp:CommandField ShowDeleteButton="true" />
c＃
c#
public partial class viewfile : System.Web.UI.Page
{
private SqlConnection conn = new SqlConnection("Data Source=.\\sqlexpress;Initial Catalog=college_education;User ID=sa;Password=system;");
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
gvbind();
}
}
protected void gvbind()
{
conn.Open();
SqlCommand cmd = new SqlCommand("Select * from file_rec", conn);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
conn.Close();
if (ds.Tables[0].Rows.Count > 0)
{
GridView1.DataSource = ds;
GridView1.DataBind();
}
else
{
ds.Tables[0].Rows.Add(ds.Tables[0].NewRow());
GridView1.DataSource = ds;
GridView1.DataBind();
int columncount = GridView1.Rows[0].Cells.Count;
GridView1.Rows[0].Cells.Clear();
GridView1.Rows[0].Cells.Add(new TableCell());
GridView1.Rows[0].Cells[0].ColumnSpan = columncount;
GridView1.Rows[0].Cells[0].Text = "No Records Found";
}
}
protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
GridViewRow row = (GridViewRow)GridView1.Rows[e.RowIndex];
Label lbldeleteid = (Label)row.FindControl("lblID");
conn.Open();
SqlCommand cmd = new SqlCommand("delete FROM file_rec where serial_no='" + Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value.ToString()) + "'", conn);
cmd.ExecuteNonQuery();
conn.Close();
gvbind();
}
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
GridView1.EditIndex = e.NewEditIndex;
gvbind();
}
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
int serial_no = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value.ToString());
GridViewRow row = (GridViewRow)GridView1.Rows[e.RowIndex];
Label lblID = (Label)row.FindControl("lblID");
//TextBox txtname=(TextBox)gr.cell[].control[];
TextBox textinternal_receiving = (TextBox)row.Cells[0].Controls[0];
TextBox textdate = (TextBox)row.Cells[1].Controls[0];
TextBox textdepartment = (TextBox)row.Cells[2].Controls[0];
TextBox textdepartment_type = (TextBox)row.Cells[3].Controls[0];
TextBox textorganization = (TextBox)row.Cells[4].Controls[0];
TextBox textorganization_type = (TextBox)row.Cells[5].Controls[0];
TextBox textfile_no = (TextBox)row.Cells[6].Controls[0];
TextBox textsubject = (TextBox)row.Cells[7].Controls[0];
TextBox textfile_name = (TextBox)row.Cells[8].Controls[0];
TextBox textstatus = (TextBox)row.Cells[9].Controls[0];
//TextBox textadd = (TextBox)row.FindControl("txtadd");
//TextBox textc = (TextBox)row.FindControl("txtc");
GridView1.EditIndex = -1;
conn.Open();
//SqlCommand cmd = new SqlCommand("SELECT * FROM detail", conn);
SqlCommand cmd = new SqlCommand("update file_rec set internal_receiving='" + textinternal_receiving + "',date='" + textdate + "',department='" + textdepartment + "',department_type='" + textdepartment_type + "',organization='" + textorganization + "',organization_type='" + textorganization_type + "',file_no='" + textfile_no + "',subject='" + textsubject + "',file_name='" + textfile_name + "',status='" + textstatus + "'where ='" + serial_no + "'", conn);
cmd.ExecuteNonQuery();
conn.Close();
gvbind();
//GridView1.DataBind();
}
protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
GridView1.PageIndex = e.NewPageIndex;
gvbind();
}
protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
GridView1.EditIndex = -1;
gvbind();
}
protected void Button1_Click(object sender, EventArgs e)
{
Response.Redirect("adminview.aspx");
}
}
推荐答案
显示此视图的表单必须声明runat =server。如果您已添加并且仍未看到引用，请将以下内容添加到页面加载方法中， ClientScriptManager.GetPostBackEventReference 。
The Form that displays this view in must have runat="server" declared. In the case that you have this added and are still not seeing the reference, add the following to your page load method, ClientScriptManager.GetPostBackEventReference.
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