C# 如何使用gridview中的按钮单击并在gridview中显示数据库中插入的行来添加空行并将该行插入数据库?
这里显示的代码是添加一个空行并将该行插入数据库,但在运行时不显示该行。请有人可以编辑该代码,并帮助我得到我所期望的。请帮帮我。我受够了做这些事。我不明白。如果有人有我期望的代码,请发送给我的邮箱id:sivaraman。loganathan@gmail.comC# 如何使用gridview中的按钮单击并在gridview中显示数据库中插入的行来添加空行并将该行插入数据库?,c#,sql,asp.net,sql-server,gridview,C#,Sql,Asp.net,Sql Server,Gridview,这里显示的代码是添加一个空行并将该行插入数据库,但在运行时不显示该行。请有人可以编辑该代码,并帮助我得到我所期望的。请帮帮我。我受够了做这些事。我不明白。如果有人有我期望的代码,请发送给我的邮箱id:sivaraman。loganathan@gmail.com <body> <form id="form1" runat="server"> <div> <asp:gridview ID="Gridview1" runat="server" ShowFoot
<body>
<form id="form1" runat="server">
<div>
<asp:gridview ID="Gridview1" runat="server" ShowFooter="true" AutoGenerateColumns="false">
<Columns>
<asp:BoundField DataField="RowNumber" HeaderText="Row Number" />
<asp:TemplateField HeaderText="Header 1">
<ItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Eval("Column1") %>'></asp:TextBox>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" ></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Header 2">
<ItemTemplate>
<asp:TextBox ID="TextBox2" runat="server" Text='<%# Eval("Column2") %>'></asp:TextBox>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Header 3">
<ItemTemplate>
<asp:TextBox ID="TextBox3" runat="server" Text='<%# Eval("Column3") %>'></asp:TextBox>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
</Columns>
</asp:gridview>
<asp:Button ID="ButtonAdd" runat="server" Text="Add New Row"
OnClick="ButtonAdd_Click" />
<asp:Button ID="Button1" runat="server" Text="Button"
OnClick="ButtonSave_Click"/>
</div>
</form>
</body>
代码隐藏:
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
SetInitialRow();
}
}
private void BindData()
{
DataTable dt = new DataTable();
using (SqlConnection con = new SqlConnection(GetConnectionString()))
{
string strQuery = "SELECT * FROM SampleTabL";
SqlCommand cmd = new SqlCommand(strQuery);
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.Connection = con;
con.Open();
sda.SelectCommand = cmd;
sda.Fill(dt);
Gridview1.DataSource = dt;
Gridview1.DataBind();
}
}
}
private void SetInitialRow()
{
DataTable dt = new DataTable();
DataRow dr = null;
dt.Columns.Add(new DataColumn("RowNumber", typeof(string)));
dt.Columns.Add(new DataColumn("Column1", typeof(string)));
dt.Columns.Add(new DataColumn("Column2", typeof(string)));
dt.Columns.Add(new DataColumn("Column3", typeof(string)));
dr = dt.NewRow();
dr["RowNumber"] = 1;
dr["Column1"] = string.Empty;
dr["Column2"] = string.Empty;
dr["Column3"] = string.Empty;
dt.Rows.Add(dr);
//dr = dt.NewRow();
//Store the DataTable in ViewState
ViewState["CurrentTable"] = dt;
Gridview1.DataSource = dt;
Gridview1.DataBind();
}
protected void ButtonAdd_Click(object sender, EventArgs e)
{
AddNewRowToGrid();
}
private void AddNewRowToGrid()
{
int rowIndex = 0;
if (ViewState["CurrentTable"] != null)
{
DataTable dtCurrentTable = (DataTable)ViewState["CurrentTable"];
DataRow drCurrentRow = null;
if (dtCurrentTable.Rows.Count > 0)
{
for (int i = 1; i <= dtCurrentTable.Rows.Count; i++)
{
//extract the TextBox values
TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("TextBox1");
TextBox box2 = (TextBox)Gridview1.Rows[rowIndex].Cells[2].FindControl("TextBox2");
TextBox box3 = (TextBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("TextBox3");
drCurrentRow = dtCurrentTable.NewRow();
drCurrentRow["RowNumber"] = i + 1;
dtCurrentTable.Rows[i - 1]["Column1"] = box1.Text;
dtCurrentTable.Rows[i - 1]["Column2"] = box2.Text;
dtCurrentTable.Rows[i - 1]["Column3"] = box3.Text;
rowIndex++;
}
dtCurrentTable.Rows.Add(drCurrentRow);
ViewState["CurrentTable"] = dtCurrentTable;
Gridview1.DataSource = dtCurrentTable;
Gridview1.DataBind();
}
}
else
{
Response.Write("ViewState is null");
}
//Set Previous Data on Postbacks
SetPreviousData();
}
private void SetPreviousData()
{
int rowIndex = 0;
if (ViewState["CurrentTable"] != null)
{
DataTable dt = (DataTable)ViewState["CurrentTable"];
if (dt.Rows.Count > 0)
{
for (int i = 0; i < dt.Rows.Count; i++)
{
TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("TextBox1");
TextBox box2 = (TextBox)Gridview1.Rows[rowIndex].Cells[2].FindControl("TextBox2");
TextBox box3 = (TextBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("TextBox3");
box1.Text = dt.Rows[i]["Column1"].ToString();
box2.Text = dt.Rows[i]["Column2"].ToString();
box3.Text = dt.Rows[i]["Column3"].ToString();
rowIndex++;
}
}
}
}
private string GetConnectionString()
{
//"DBConnection" is the name of the Connection String
//that was set up from the web.config file
return System.Configuration.ConfigurationManager.ConnectionStrings["DBConnection"].ConnectionString;
}
private void InsertRecords(StringCollection sc)
{
SqlConnection conn = new SqlConnection(GetConnectionString());
StringBuilder sb = new StringBuilder(string.Empty);
string[] splitItems = null;
foreach (string item in sc)
{
const string sqlStatement = "INSERT INTO SampleTabl (Column1,Column2,Column3) VALUES";
if (item.Contains(","))
{
splitItems = item.Split(",".ToCharArray());
sb.AppendFormat("{0}('{1}','{2}','{3}'); ", sqlStatement, splitItems[0], splitItems[1], splitItems[2]);
}
}
try
{
conn.Open();
SqlCommand cmd = new SqlCommand(sb.ToString(), conn);
cmd.CommandType = CommandType.Text;
cmd.ExecuteNonQuery();
//Display a popup which indicates that the record was successfully inserted
Page.ClientScript.RegisterClientScriptBlock(typeof(Page), "Script", "alert('Records Successfuly Saved!');", true);
}
catch (System.Data.SqlClient.SqlException ex)
{
string msg = "Insert Error:";
msg += ex.Message;
throw new Exception(msg);
}
finally
{
conn.Close();
}
}
protected void ButtonSave_Click(object sender, EventArgs e)
{
int rowIndex = 0;
StringCollection sc = new StringCollection();
if (ViewState["CurrentTable"] != null)
{
DataTable dtCurrentTable = (DataTable)ViewState["CurrentTable"];
if (dtCurrentTable.Rows.Count > 0)
{
for (int i = 1; i <= dtCurrentTable.Rows.Count; i++)
{
//extract the TextBox values
TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("TextBox1");
TextBox box2 = (TextBox)Gridview1.Rows[rowIndex].Cells[2].FindControl("TextBox2");
TextBox box3 = (TextBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("TextBox3");
//get the values from the TextBoxes
//then add it to the collections with a comma "," as the delimited values
sc.Add(box1.Text + "," + box2.Text + "," + box3.Text);
rowIndex++;
}
//Call the method for executing inserts
InsertRecords(sc);
}
}
}
受保护的无效页面加载(对象发送方,事件参数e)
{
如果(!Page.IsPostBack)
{
SetInitialRow();
}
}
私有void BindData()
{
DataTable dt=新的DataTable();
使用(SqlConnection con=newsqlconnection(GetConnectionString()))
{
string strQuery=“SELECT*FROM SampleTabL”;
SqlCommand cmd=新的SqlCommand(strQuery);
使用(SqlDataAdapter sda=newsqldataadapter())
{
cmd.Connection=con;
con.Open();
sda.SelectCommand=cmd;
sda.填充(dt);
Gridview1.DataSource=dt;
Gridview1.DataBind();
}
}
}
私有void SetInitialRow()
{
DataTable dt=新的DataTable();
数据行dr=null;
添加(新的数据列(“行数”,typeof(字符串));
Add(新的数据列(“Column1”,typeof(string));
Add(新的数据列(“Column2”,typeof(string));
Add(新的数据列(“Column3”,typeof(string));
dr=dt.NewRow();
dr[“行数”]=1;
dr[“Column1”]=string.Empty;
dr[“Column2”]=string.Empty;
dr[“Column3”]=string.Empty;
dt.Rows.Add(dr);
//dr=dt.NewRow();
//将数据表存储在ViewState中
视图状态[“当前表”]=dt;
Gridview1.DataSource=dt;
Gridview1.DataBind();
}
受保护的无效按钮单击(对象发送者,事件参数e)
{
AddNewRowToGrid();
}
私有void AddNewRowToGrid()
{
int rowIndex=0;
如果(ViewState[“CurrentTable”]!=null)
{
DataTable dtCurrentTable=(DataTable)视图状态[“CurrentTable”];
DataRow drCurrentRow=null;
如果(dtCurrentTable.Rows.Count>0)
{
对于(int i=1;i 0)
{
对于(int i=0;i0)
{
对于(int i=1;i问题不是很清楚,因此我假设您希望存储插入gridview
中的数据,并希望在页面加载后将其显示在同一gridview
上
如果是这种情况,那么代码的问题是,您没有在pageload
上调用BindData()方法。另一个调用SetInitialRow()
的方法在pageload
上可能会弄乱您试图绑定数据的gridview
您可以执行以下操作:
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
BindData();
}
}
private void BindData()
{
DataTable dt = new DataTable();
using (SqlConnection con = new SqlConnection(GetConnectionString()))
{
string strQuery = "SELECT * FROM SampleTabL";
SqlCommand cmd = new SqlCommand(strQuery);
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.Connection = con;
con.Open();
sda.SelectCommand = cmd;
sda.Fill(dt);
if (dt.Rows.Count>0)
{
Gridview1.DataSource = dt;
Gridview1.DataBind();
}
else
{
SetInitialRow();
}
}
}
}
堆栈溢出不是一项代码编写服务。我们可以提供帮助,但我们不是来为您完成工作的。请帮助我完成此任务您创建了新行,但从未将其添加到表中。