我想在gridview中从数据库中检索和绑定值
这是在gridview中动态添加控件的代码，此代码工作正常
代码：
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
SetInitialRow();
}
}
private void SetInitialRow()
{
DataTable dt = new DataTable();
DataRow dr = null;
dt.Columns.Add(new DataColumn("Column0", 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)));
dt.Columns.Add(new DataColumn("Column4", typeof(string)));
dt.Columns.Add(new DataColumn("Column5", typeof(string)));
dt.Columns.Add(new DataColumn("Column6", typeof(string)));
dt.Columns.Add(new DataColumn("Column7", typeof(string)));
dr = dt.NewRow();
dr["Column0"] = string.Empty;
dr["Column1"] = string.Empty;
dr["Column2"] = string.Empty;
dr["Column3"] = string.Empty;
dr["Column4"] = string.Empty;
dr["Column5"] = string.Empty;
dr["Column6"] = string.Empty;
dr["Column7"] = string.Empty;
dt.Rows.Add(dr);
dr = dt.NewRow();
//Store the DataTable in ViewState
ViewState["CurrentTable"] = dt;
Gridview1.DataSource = ViewState["CurrentTable"];
Gridview1.DataSource = dt;
Gridview1.DataBind();
}
这是在gridview中再添加一行的代码
private void AddNewRowToGrid()
{
int rowIndex = 0;
if (ViewState["CurrentTable"] != null)
{
DataTable dtCurrentTable = (DataTable)ViewState["CurrentTable"];
DataTable dtCurrentTable1 = (DataTable)Application["CurrentTable"];
DataRow drCurrentRow = null;
if (dtCurrentTable.Rows.Count > 0)
{
for (int i = 1; i <= dtCurrentTable.Rows.Count; i++)
{
//extract the TextBox values
DropDownList drop1 = (DropDownList)Gridview1.Rows[rowIndex].Cells[0].FindControl("dropActivities");
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");
TextBox box4 = (TextBox)Gridview1.Rows[rowIndex].Cells[4].FindControl("TextBox4");
TextBox box5 = (TextBox)Gridview1.Rows[rowIndex].Cells[5].FindControl("TextBox5");
TextBox box6 = (TextBox)Gridview1.Rows[rowIndex].Cells[6].FindControl("TextBox6");
TextBox box7 = (TextBox)Gridview1.Rows[rowIndex].Cells[7].FindControl("TextBox7");
drCurrentRow = dtCurrentTable.NewRow();
dtCurrentTable.Rows[i - 1]["Column0"] = drop1.SelectedItem.Text;
dtCurrentTable.Rows[i - 1]["Column1"] = box1.Text;
dtCurrentTable.Rows[i - 1]["Column2"] = box2.Text;
dtCurrentTable.Rows[i - 1]["Column3"] = box3.Text;
dtCurrentTable.Rows[i - 1]["Column4"] = box4.Text;
dtCurrentTable.Rows[i - 1]["Column5"] = box5.Text;
dtCurrentTable.Rows[i - 1]["Column6"] = box6.Text;
dtCurrentTable.Rows[i - 1]["Column7"] = box7.Text;
rowIndex++;
}
dtCurrentTable.Rows.Add(drCurrentRow);
Application["CurrentTable"] = dtCurrentTable;
Gridview1.DataSource = dtCurrentTable;
Gridview1.DataBind();
}
}
else
{
Response.Write("ViewState is null");
}
//Set Previous Data on Postbacks
SetPreviousData();
}
保留前一行值的代码
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++)
{
DropDownList drop1 = (DropDownList)Gridview1.Rows[rowIndex].Cells[0].FindControl("dropActivities");
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");
TextBox box4 = (TextBox)Gridview1.Rows[rowIndex].Cells[4].FindControl("TextBox4");
TextBox box5 = (TextBox)Gridview1.Rows[rowIndex].Cells[5].FindControl("TextBox5");
TextBox box6 = (TextBox)Gridview1.Rows[rowIndex].Cells[6].FindControl("TextBox6");
TextBox box7 = (TextBox)Gridview1.Rows[rowIndex].Cells[7].FindControl("TextBox7");
drop1.SelectedValue = dt.Rows[i]["Column0"].ToString();
box1.Text = dt.Rows[i]["Column1"].ToString();
box2.Text = dt.Rows[i]["Column2"].ToString();
box3.Text = dt.Rows[i]["Column3"].ToString();
box4.Text = dt.Rows[i]["Column4"].ToString();
box5.Text = dt.Rows[i]["Column5"].ToString();
box6.Text = dt.Rows[i]["Column6"].ToString();
box7.Text = dt.Rows[i]["Column7"].ToString();
rowIndex++;
}
}
}
}
在数据库中保存值的代码：
protected void btnsave_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
DropDownList drop1 = (DropDownList)Gridview1.Rows[rowIndex].Cells[0].FindControl("dropActivities");
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");
TextBox box4 = (TextBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("TextBox4");
TextBox box5 = (TextBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("TextBox5");
TextBox box6 = (TextBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("TextBox6");
TextBox box7 = (TextBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("TextBox7");
DbConnection.Open();
OleDbCommand cmd1 = new OleDbCommand("select emp_id from emp_master where username = '" + username + "'", DbConnection);
string empid = (string)cmd1.ExecuteScalar();
OleDbCommand cmd = new OleDbCommand("INSERT INTO activity_values (id,emp_id,activities,monday,tuesday,wednesday,thursday,friday,saturday,sunday,week) VALUES(id.nextval,'" + empid + "','" + drop1.SelectedItem.Text + "', '" + box1.Text + "', '" + box2.Text + "', '" + box3.Text + "', '" + box4.Text + "', '" + box5.Text + "', '" + box6.Text + "', '" + box7.Text + "','" + weekNumNow + "')", DbConnection);
cmd.ExecuteNonQuery();
DbConnection.Close();
sc.Add(drop1.SelectedItem.Text +"," + box1.Text + "," + box2.Text + "," + box3.Text + "," + box4.Text + "," + box5.Text + "," + box6.Text + "," + box7.Text);
rowIndex++;
}
//Call the method for executing inserts
//InsertRecords(sc);
}
}
桌子：
Activities Monday Tues Wedn Thu Fri Sat Sun Week Id
Permission 1 5 3 4 5 6 5 43 1
Fun @ work 2 5 4 4 6 7 4 43 2
用于检索值并将其绑定到 gridview 的代码
但是这段代码不起作用
public void BindData()
{
int rowIndex = 0;
DataRow drCurrentRow;
OleDbCommand cmd = new OleDbCommand("select activities,monday,tuesday,wednesday,thursday,friday,saturday,sunday from activity_values where week = '" + weekNumNow + "' and emp_id = (select emp_id from emp_master where username = '" + username + "')", DbConnection);
DbConnection.Open();
OleDbDataAdapter da = new OleDbDataAdapter(cmd);
DataTable ds = new DataTable();
da.Fill(ds);
ViewState["CurrentTable"] = ds;
Gridview1.DataSource = ds;
Gridview1.DataBind();
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
DropDownList drop1 = (DropDownList)Gridview1.Rows[rowIndex].Cells[0].FindControl("dropActivities");
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");
TextBox box4 = (TextBox)Gridview1.Rows[rowIndex].Cells[4].FindControl("TextBox4");
TextBox box5 = (TextBox)Gridview1.Rows[rowIndex].Cells[5].FindControl("TextBox5");
TextBox box6 = (TextBox)Gridview1.Rows[rowIndex].Cells[6].FindControl("TextBox6");
TextBox box7 = (TextBox)Gridview1.Rows[rowIndex].Cells[7].FindControl("TextBox7");
drCurrentRow = dtCurrentTable.NewRow();
//
rowIndex++;
}
dtCurrentTable.Rows.Add(drCurrentRow);
}
}
rowIndex++;
}
有任何想法吗？提前致谢