我是 ASP.NET 的新手
错误：“FormView 'FormView1' 触发了未处理的事件 ItemInserting。”
我有一个 FormView 在页面首次加载时设置为插入模式。我还想预先填充这些输入文本框和下拉列表中的值。因此，我能够通过使用后面的代码并将值写入这些框来使其工作，但是当我单击“插入”链接按钮时，它给了我这个错误。
这是我的 FormView 代码：
<asp:FormView ID="FormView1" DefaultMode="Insert" runat="server"
DateSourceID="dsApprovedCreateNew"
DataKeyNames="ApprovedID"
>
<InsertItemTemplate>
<table class="FormDetail" width="95%" height="100%" align="center" class="FormDetail" >
<tr>
<td class="right">MDF Name:</td>
<td>
<asp:TextBox ID="MDFName" runat="server" Width="50%" Text='<%# Bind("MDFName") %>' > </asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1"
ControlToValidate="MDFName" Text="The MDFName field is required!" runat="server" />
</td>
</tr>
<tr>
<td>Vendor Name</td>
<td>
<asp:DropDownList ID="ddlVendorList" runat="server"></asp:DropDownList>
</td>
</tr>
<tr>
<td>Vendor BU</td>
<td>
<asp:DropDownList ID="ddlVendorBUList" runat="server"></asp:DropDownList>
</td>
</tr>
<tr>
<td class="right">Vendor Quarter:</td>
<td>
<asp:DropDownList ID="VendorQuarter" runat="server" Text='<%# Bind("VendorQuarter") %>'
AppendDataBoundItems="true">
<asp:ListItem Value="Q1">Q1</asp:ListItem>
<asp:ListItem Value="Q2">Q2</asp:ListItem>
<asp:ListItem Value="Q3">Q3</asp:ListItem>
<asp:ListItem Value="Q4">Q4</asp:ListItem>
</asp:DropDownList>
</td>
</tr>
<tr>
<td class="right">MDF Amount:</td>
<td>
<asp:TextBox ID="MDFAmount" runat="server" Width="20%" TextMode="SingleLine" Text='<%# Bind("VendorQuarter") %>'></asp:TextBox>
<asp:CustomValidator ID="RangeValidator3" runat="server" ControlToValidate="MDFAmount"
ErrorMessage="Enter numerical value only!" ClientValidationFunction="validateNumber"/>
<asp:RequiredFieldValidator ControlToValidate="MDFAmount" Text="The MDFAmount field is required!" runat="server" />
<%--
<asp:RegularExpressionValidator ID="RangeValidator4" runat="server" ControlToValidate="MDFAmount"
Display="Dynamic" ErrorMessage="*Enter numerical value only"
ValidationExpression="^\d*[0-9](|.\d*[0-9]|,\d*[0-9])?$"/>
--%>
</td>
</tr>
<tr>
<td class="right">Begin Date (mm/dd/yyyy):</td>
<td>
<asp:TextBox ID="BeginDate" runat="server" Width="50%" TextMode="SingleLine" DataFormatString="{0:MM/dd/yyyy}"
ApplyFormatInInsertMode="true" ></asp:TextBox>
<asp:RegularExpressionValidator ID="RangeValidator1" runat="server" ControlToValidate="BeginDate" ForeColor="Red"
ErrorMessage="Enter Valid Date in dd/mm/yyyy format." SetFocusOnError="True" Display="Dynamic" Type="Date"
ValidationExpression="^(0[1-9]|1[012])[-/.](0[1-9]|[12][0-9]|3[01])[-/.](19|20)\d\d$">
</asp:RegularExpressionValidator>
</td>
</tr>
<tr>
<td class="right">End Date (mm/dd/yyyy):</td>
<td>
<asp:TextBox ID="EndDate" runat="server" Width="50%"></asp:TextBox>
<asp:RegularExpressionValidator ID="RangeValidator2" runat="server" ControlToValidate="EndDate" ForeColor="Red"
ErrorMessage="Enter Valid Date in dd/mm/yyyy format." SetFocusOnError="True" Display="Dynamic" Type="Date"
ValidationExpression="^(0[1-9]|1[012])[-/.](0[1-9]|[12][0-9]|3[01])[-/.](19|20)\d\d$"/>
</td>
</tr>
<tr>
<td class="right">MDF Summary:</td>
<td>
<asp:TextBox ID="MDFSummary" TextMode="MultiLine" Width="50%" Height="100" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td class="right">Status:</td>
<td>
<asp:DropDownList ID="Status" runat="server"
AppendDataBoundItems="true">
<asp:ListItem>Active</asp:ListItem>
<asp:ListItem>Inactive</asp:ListItem>
</asp:DropDownList>
</td>
</tr>
<tr>
<td colspan="2">
<asp:linkbutton id="InsertButton"
text="Insert"
commandname="Insert"
runat="server" />
<asp:linkbutton id="CancelButton"
text="Cancel"
commandname="Cancel"
runat="server" />
</td>
</tr>
</table>
<asp:HiddenField ID="CreatedBy" runat="server" value="44444"/>
</InsertItemTemplate>
</asp:FormView>
<asp:sqldatasource id="dsApprovedCreateNew"
connectionstring="<%$ ConnectionStrings:ConnectionString%>"
SelectCommand="SELECT p.*
, (SELECT VendorName FROM MDF_Vendor WHERE VendorID = p.VendorID) AS VendorName
, (SELECT VendorBUName FROM MDF_VendorBU WHERE VendorBUID = p.VendorBUID) AS VendorBUName
FROM dbo.MDF_Proposed p Where p.ProposedID = 63"
InsertCommand = "INSERT INTO [MDF_Approved] ([VendorID], [VendorBUID], [MDFName]
, [BeginDate], [EndDate], [CreatedBy])
VALUES (@VendorID, @VendorBUID, @MDFName, @BeginDate, @EndDate, '1234') "
runat="server">
<SelectParameters>
<asp:QueryStringParameter Name="ProposedID" QueryStringField="ProposedID" runat="server" />
</SelectParameters>
</asp:sqldatasource>
</form>
背后的代码（我是新手，所以不要嘲笑我的代码，欢迎提出建议）
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Configuration;
using System.Data.SqlClient;
using System.Data;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
//FormView1.PreRender += FormView1_PreRender;
//FormView1.DataBinding += FormView1_DataBinding;
if (!IsPostBack)
{
//Response.Write("ProposedID: " + Request.QueryString["ProposedID"]);
int ProposedID = FetchQueryStringIdentifierByKey("ProposedID");
Response.Write("ProposedID : " + ProposedID);
//FormView1.DataSource = this.GetData(ProposedID);
//FormView1.DataBind();
FillFormValues(ProposedID);
//GetData(ProposedID);
}
}
protected int FetchQueryStringIdentifierByKey(string key)
{
int identifier;
var isInt = int.TryParse(Request.QueryString[key], out identifier);
return (isInt) ? identifier : 0;
}
private DataSet GetData(int RecID)
{
string conString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
string query = "SELECT * FROM MDF_Proposed WHERE ProposedID = 63";
SqlCommand cmd = new SqlCommand(query);
SqlParameter[] param = new SqlParameter[1];
param[0] = new SqlParameter("@RecID", SqlDbType.Int, 10);
param[0].Value = 1; // RecID;
for (int i = 0; i < param.Length; i++)
{
cmd.Parameters.Add(param[i]);
}
using (SqlConnection con = new SqlConnection(GetConnectionString()))
{
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.Connection = con;
sda.SelectCommand = cmd;
using (DataSet ds = new DataSet())
{
sda.Fill(ds);
return ds;
}
}
}
}
private void FillFormValues(int RecID)
{
string strConn = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
SqlConnection con = new SqlConnection(strConn);
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandType = CommandType.Text;
cmd.CommandText = "SELECT * FROM MDF_Proposed WHERE ProposedID = 63";
cmd.Parameters.AddWithValue("@RecID", RecID);
DataSet objDs = new DataSet();
SqlDataAdapter dAdapter = new SqlDataAdapter();
dAdapter.SelectCommand = cmd;
con.Open();
dAdapter.Fill(objDs);
con.Close();
if (objDs.Tables[0].Rows.Count > 0)
{
if (FormView1.CurrentMode == FormViewMode.Insert)
{
Response.Write("The Mode: " + FormView1.CurrentMode);
TextBox MDFName = (TextBox)FormView1.FindControl("MDFName");
MDFName.Text = objDs.Tables[0].Rows[0]["MDFName"].ToString();
TextBox MDFAmount = (TextBox)FormView1.FindControl("MDFAmount");
MDFAmount.Text = objDs.Tables[0].Rows[0]["MDFAmount"].ToString();
TextBox BeginDate = (TextBox)FormView1.FindControl("BeginDate");
BeginDate.Text = FormatDateNoTime(objDs.Tables[0].Rows[0]["BeginDate"].ToString());
TextBox EndDate = (TextBox)FormView1.FindControl("EndDate");
EndDate.Text = FormatDateNoTime(objDs.Tables[0].Rows[0]["EndDate"].ToString());
fillVendorDLL(Convert.ToInt32(objDs.Tables[0].Rows[0]["VendorID"]));
fillVendorBUDLL(Convert.ToInt32(objDs.Tables[0].Rows[0]["VendorID"]), Convert.ToInt32(objDs.Tables[0].Rows[0]["VendorBUID"]));
TextBox MDFSummary = (TextBox)FormView1.FindControl("MDFSummary");
MDFSummary.Text = objDs.Tables[0].Rows[0]["MDFSummary"].ToString();
}
else
{
Response.Write("Nothing");
}
}
else
{
Response.Write("No Record found");
}
}
protected void fillVendorDLL(int VendorID)
{
//DropDownList ddlVendor = (DropDownList)sender;
// DropDownList ddlVendor = (DropDownList)DetailsView1.FindControl("updateVendorName");
//DropDownList ddlVendor = (DropDownList)sender;
//DropDownList ddlVendor = (DropDownList)DetailsView1.FindControl(ddlID);
DropDownList ddlVendor =
(DropDownList)FormView1.FindControl("ddlVendorList");
if (ddlVendor != null)
{
//Response.Write("SelectChanged");
//int VendorID = Convert.ToInt32(ddlVendor.SelectedValue.ToString());
//Response.Write("VendorID: " + VendorID);
ddlVendor.Items.Clear();
string strConn = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
SqlConnection con = new SqlConnection(strConn);
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandType = CommandType.Text;
cmd.CommandText = "SELECT VendorID, VendorName FROM dbo.MDF_Vendor";
cmd.Parameters.AddWithValue("@VendorID", VendorID);
DataSet objDs = new DataSet();
SqlDataAdapter dAdapter = new SqlDataAdapter();
dAdapter.SelectCommand = cmd;
con.Open();
dAdapter.Fill(objDs);
con.Close();
if (objDs.Tables[0].Rows.Count > 0)
{
foreach (DataRow dr in objDs.Tables[0].Rows)
{
ddlVendor.Items.Insert(0, new ListItem((dr["VendorName"]).ToString(), (dr["VendorID"]).ToString()));
ddlVendor.SelectedValue = Convert.ToString(VendorID);
}
}
}
}
protected void fillVendorBUDLL(int VendorID, int VendorBUID)
{
//DropDownList ddlVendor = (DropDownList)sender;
// DropDownList ddlVendor = (DropDownList)DetailsView1.FindControl("updateVendorName");
//DropDownList ddlVendor = (DropDownList)sender;
//DropDownList ddlVendor = (DropDownList)DetailsView1.FindControl(ddlID);
DropDownList ddlVendorBU =
(DropDownList)FormView1.FindControl("ddlVendorBUList");
if (ddlVendorBU != null)
{
//Response.Write("SelectChanged");
//int VendorID = Convert.ToInt32(ddlVendor.SelectedValue.ToString());
//Response.Write("VendorID: " + VendorID);
ddlVendorBU.Items.Clear();
string strConn = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
SqlConnection con = new SqlConnection(strConn);
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandType = CommandType.Text;
cmd.CommandText = "SELECT VendorBUID, VendorBUName FROM dbo.MDF_VendorBU WHERE VendorID = @VendorID";
cmd.Parameters.AddWithValue("@VendorID", VendorID);
cmd.Parameters.AddWithValue("@VendorBUID", VendorBUID);
DataSet objDs = new DataSet();
SqlDataAdapter dAdapter = new SqlDataAdapter();
dAdapter.SelectCommand = cmd;
con.Open();
dAdapter.Fill(objDs);
con.Close();
if (objDs.Tables[0].Rows.Count > 0)
{
foreach (DataRow dr in objDs.Tables[0].Rows)
{
ddlVendorBU.Items.Insert(0, new ListItem((dr["VendorBUName"]).ToString(), (dr["VendorBUID"]).ToString()));
ddlVendorBU.SelectedValue = Convert.ToString(VendorBUID);
}
}
}
}
public string GetConnectionString(){
//sets the connection string from your web config file "ConnString" is the name of your Connection String
return System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
}
private void ExecuteInsert(string VendorName, string VendorBU, string MDFAmount
, string StartDate, string EndDate, string VendorQuarter, string MDFName, String MDFSummary, string Status, string CreatedBy)
{
SqlConnection conn = new SqlConnection(GetConnectionString());
string sql = "INSERT INTO MDF_Proposed (VendorID, VendorBUID, MDFAmount, BeginDate, EndDate, VendorQuarter
, MDFName, MDFSummary, Status, CreatedBy) VALUES "
+ " (@VendorID, @VendorBUID, @MDFAmount, @StartDate, @EndDate, @VendorQuarter, @MDFName, @MDFSummary, @Status, @CreatedBy)";
try
{
conn.Open();
SqlCommand cmd = new SqlCommand(sql, conn);
SqlParameter[] param = new SqlParameter[10];
param[0] = new SqlParameter("@VendorID", SqlDbType.VarChar, 50);
param[1] = new SqlParameter("@VendorBUID", SqlDbType.VarChar, 50);
param[2] = new SqlParameter("@MDFAmount", SqlDbType.Decimal);
param[2].Precision = 19;
param[2].Scale = 4;
param[3] = new SqlParameter("@StartDate", SqlDbType.DateTime);
param[4] = new SqlParameter("@EndDate", SqlDbType.DateTime);
param[5] = new SqlParameter("@VendorQuarter", SqlDbType.VarChar, 50);
param[6] = new SqlParameter("@MDFName", SqlDbType.VarChar, 50);
param[7] = new SqlParameter("@MDFSummary", SqlDbType.VarChar, 2000);
param[8] = new SqlParameter("@Status", SqlDbType.VarChar, 50);
param[9] = new SqlParameter("@CreatedBy", SqlDbType.Int, 10);
param[0].Value = VendorName;
param[1].Value = VendorBU;
param[2].Value = MDFAmount;
param[3].Value = StartDate;
param[4].Value = EndDate;
param[5].Value = VendorQuarter;
param[6].Value = MDFName;
param[7].Value = MDFSummary;
param[8].Value = Status;
param[9].Value = CreatedBy;
for (int i = 0; i < param.Length; i++)
{
cmd.Parameters.Add(param[i]);
}
cmd.CommandType = CommandType.Text;
cmd.ExecuteNonQuery();
}
catch (System.Data.SqlClient.SqlException ex)
{
string msg = "Insert Error:";
msg += ex.Message;
throw new Exception(msg);
}
finally
{
conn.Close();
//ClientScript.RegisterStartupScript(this.GetType(), "scriptid", window.parent.location.href='ViewVendors.aspx'", true);
Response.Write("<script>window.parent.location = 'ProposalListView.aspx';</script>");
//Response.Redirect("ProposalListView.aspx");
//Response.Write("<script>this.dialog('close');</script>");
}
}
public static void ClearControls(Control Parent){
if (Parent is TextBox)
{ (Parent as TextBox).Text = string.Empty; }
else
{
foreach (Control c in Parent.Controls)
ClearControls(c);
}
}
public string FormatDateNoTime(string input)
{
string thedate;
DateTime strDate = DateTime.Parse(input);
thedate = strDate.ToString("MM/dd/yyyy");
return thedate;
}
}