[英]Put rows into gridView one by one whenever on click event fires in asp.net
I want to add data(or row) in the grid whenever I click on button. 我想在单击按钮时在网格中添加数据(或行)。
So code behind of button is like whenever a user click on button a parameterize the stored procedure called which gets the data from SQL Server. 因此,按钮后面的代码就像每当用户单击按钮时,都会对称为“存储过程”的参数进行参数化,该存储过程将从SQL Server获取数据。 So each time it will get only one record.
因此,每次只会得到一个记录。
Problem is that when user click on button it successfully get first row and then again when user click on button it will override the data present in row[0]. 问题是,当用户单击按钮时,它成功获得第一行,然后再次单击用户按钮,它将覆盖行[0]中存在的数据。
I want whenever user click another time. 我想每当用户单击其他时间。 the data comes in next row and data present in previous row remains same.
数据进入下一行,而前一行中的数据保持不变。
On Click button method: 单击按钮方法:
protected void Button5_Click(object sender, EventArgs e)
{
getLotteryApplications();
}
private void getLotteryApplications()
{
try
{
int serialNumber = 0, preference = 0;
if (SerialNum.Text != "0")
{
serialNumber = Int32.Parse(SerialNum.Text.ToString());
}
if (ddlPreferenceLottery.SelectedValue != "0")
{
preference = Int32.Parse(ddlPreferenceLottery.SelectedValue.ToString());
}
DataTable dt = DL_School_Detail.getLotteryApplications(serialNumber, preference);
selectedStudentView.DataSource = dt;
selectedStudentView.DataBind();
}
catch (Exception ex)
{
}
}
Calling class: 通话类:
public static DataTable getLotteryApplications(int serial,int preference)
{
DataTable dt = new DataTable();
try
{
using (SqlConnection con = new SqlConnection(Connect.getConnection()))
{
using (SqlCommand cmd = new SqlCommand("[dbo].[GetLotterySelectedCandidates]", con))
{
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@serialNumber", serial);
cmd.Parameters.AddWithValue("@preference", preference);
using (SqlDataAdapter da = new SqlDataAdapter(cmd))
{
using (DataSet ds = new DataSet())
{
da.Fill(ds);
dt = ds.Tables[0];
}
}
}
}
}
catch (Exception ex)
{
}
return dt;
}
private void AddNewRowToGrid()
{
try
{
int serialNumber = 0, preference = 0;
if (SerialNum.Text != "0")
{
serialNumber = Int32.Parse(SerialNum.Text.ToString());
}
if (ddlPreferenceLottery.SelectedValue != "0")
{
preference = Int32.Parse(ddlPreferenceLottery.SelectedValue.ToString());
}
DataTable griddt;
DataTable griddt2;
if (ViewState["Row"] != null)
{
griddt = (DataTable)(ViewState["Row"]);
DataRow dr = null;
if (griddt.Rows.Count > 0)
{
griddt2 = DL_School_Detail.getLotteryApplications(serialNumber, preference);
griddt.Merge(griddt2, true, MissingSchemaAction.Ignore);
if (griddt.Rows.Count > 0)
{
ViewState["Row"] = griddt;
ContentPlaceHolder1_selectedStudentView.DataSource = griddt;
ContentPlaceHolder1_selectedStudentView.DataBind();
}
else
{
ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "alertMessage", "alert('कृपया सही सीरियल नंबर और प्राथमिकता चुने !')", true);
}
}
}
else
{
DataTable dt = DL_School_Detail.getLotteryApplications(serialNumber, preference);
//dt.Merge(griddt, true, MissingSchemaAction.Ignore);
if (dt.Rows.Count > 0)
{
ViewState["Row"] = dt;
ContentPlaceHolder1_selectedStudentView.DataSource = ViewState["Row"];
ContentPlaceHolder1_selectedStudentView.DataBind();
}
else
{
ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "alertMessage", "alert('कृपया सही सीरियल नंबर और प्राथमिकता चुने !')", true);
}
}
}
catch (Exception ex)
{
}
}
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