ユーザーが新しい行を直接追加できる動的テーブルを開発しようとしています。挿入された質問の ID を取得するためのコード ビハインドに問題がありますが、取得方法がわかりません。では、どうやって手に入れるのですか？
参考までに、私が持っているデータベース設計は次のとおりです。質問テーブル：QuestionID、Question、QuestionOrder、AnswerExplanation
ASP.NET コード:
<asp:UpdatePanel ID="UpdatePanel1" runat="server" ChildrenAsTriggers="true" UpdateMode="Conditional">
<ContentTemplate>
<asp:Table ID="questionsList" runat="server" Width="50%" CellPadding="0" CellSpacing="0"
style="border:2px solid #003366; font-size:17px; font-weight:bold;">
</asp:Table>
<asp:Table ID="Table1" runat="server" Width="50%" CellPadding="0" CellSpacing="0"
style="border:2px solid #003366;">
<asp:TableFooterRow>
<asp:TableCell>Add</asp:TableCell>
<asp:TableCell>
<asp:TextBox ID="txtQuestion" runat="server"></asp:TextBox>
<ajaxToolkit:TextBoxWatermarkExtender ID="TBWE" runat="server"
TargetControlID="Question" WatermarkText="Type the Question here"
WatermarkCssClass="watermarked">
</ajaxToolkit:TextBoxWatermarkExtender>
</asp:TableCell>
<asp:TableCell>
<span style="margin:3px 10px 0px 0px;">
<asp:ImageButton ID="addButton" runat="server" ImageUrl="Images/tick_small.png" OnClick="addQuestion" />
</span>
</asp:TableCell>
</asp:TableFooterRow>
</asp:Table>
</ContentTemplate>
</asp:UpdatePanel>
コード ビハインド:
public void fill_Questions()
{
string connString = ConfigurationManager.ConnectionStrings["QuizSysDBConnectionString"].ConnectionString;
SqlConnection conn = new SqlConnection(connString);
string selectQuery = "SELECT * FROM Questions";
SqlCommand cmd = new SqlCommand(selectQuery, conn);
DataSet ds = new DataSet();
SqlDataAdapter sda = new SqlDataAdapter();
sda.SelectCommand = cmd;
Table table = (Table)UpdatePanel1.FindControl("questionsList");
try
{
//open the connection
conn.Open();
//filling the dataset with the data
sda.Fill(ds);
//close the connection
conn.Close();
}
catch
{
table.Rows.Clear();
}
//Loading the data into the table
if (ds.Tables.Count > 0)
{
int rowsNum = ds.Tables[0].Rows.Count;
for (int i = 0; i < rowsNum; i++)
{
TableRow row = new TableRow();
table.Rows.Add(row);
for (int colCount = 0; colCount < 4; colCount++)
{
TableCell cell = new TableCell();
row.Cells.Add(cell);
if (colCount == 0)
{
int n = i + 1;
cell.Controls.Add(new LiteralControl(n.ToString()));
}
else if (colCount == 1)
{
cell.Controls.Add(new LiteralControl(ds.Tables[0].Rows[i]["Question"].ToString()));
}
else if (colCount == 2)
{
cell.Controls.Add(new LiteralControl(ds.Tables[0].Rows[i]["QuestionOrder"].ToString()));
}
else if (colCount == 3)
{
cell.Controls.Add(new LiteralControl(ds.Tables[0].Rows[i]["AnswerExplanation"].ToString()));
}
else if (colCount == 4)
{
ImageButton deleteButton = new ImageButton();
deleteButton.ImageUrl = "Images/DeleteRed.png";
deleteButton.ID = ds.Tables[0].Rows[i]["Question"].ToString() + "_" + i;
deleteButton.Click += new ImageClickEventHandler(deleteQuestion);
cell.Controls.Add(deleteButton);
}
} //End for loop
}//End OUTER for loop
}//End if statement
}
//For deleting question
public void deleteQuestion(object sender, EventArgs e)
{
//int id = System.Convert.ToInt32((ImageButton)sender.ToString().Split()[0]);
try
{
string connString = ConfigurationManager.ConnectionStrings["QuizSysDB"].ConnectionString;
SqlConnection conn = new SqlConnection(connString);
string deleteQuery = "DELETE FROM Question WHERE ID = @id";
SqlCommand cmd = new SqlCommand(deleteQuery,conn);
cmd.Parameters.AddWithValue("@id", ID);
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();
fill_Questions();
}
catch(SqlException se){}
}
私の問題は、deleteQuestion メソッド内の次の行とまったく同じです。
//int id = System.Convert.ToInt32((ImageButton)sender.ToString().Split()[0]);