我想在按钮点击时将Dropdownlist值设置为默认（选择）。 [英] I want to set the Dropdownlist value to defaul(select) on button click.

问题描述

您好我的应用程序中有一个下拉列表。

我想要的是每次点击重置按钮时它应该设置为默认值（选择）。



这是我的重置代码。

Hi i have a dropdownlist in my Application.
What i want is each time when i click on the Reset button it should set to default value(select).

Here is my code for reset.

public void ResetControl()
        {
            DDLContainer.SelectedIndex = 0;
            DDLCountryLoading.SelectedIndex = 0;
            DDLCountryDestination.SelectedIndex = 0;
            //DDLContainer.Items.Insert(0, new ListItem(" --SELECT--", "0"));
           ImageMode.ImageUrl = "~/ShowImageMode.ashx?Mode=A";
        }

这是我的下拉列表代码：

Here is my dropdownlist code:

void ddlCountry()
    {
        con.Open();
        cmd = new SqlCommand("select Distinct(mCRY_VCName) from TB_TransCountry", con);
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataSet ds = new DataSet();
        da.Fill(ds);
        DDLCountryLoading.DataSource = ds;
        DDLCountryLoading.DataSourceID = String.Empty;
        DDLCountryLoading.DataTextField = "mCRY_VCName";
        DDLCountryLoading.DataValueField = "mCRY_VCName";
        DDLCountryLoading.DataBind();

        DDLCountryLoading.Items.Insert(0, new ListItem(" --SELECT--", "0"));

        DDLCountryDestination.DataSource = ds;
        DDLCountryDestination.DataSourceID = String.Empty;
        DDLCountryDestination.DataTextField = "mCRY_VCName";
        DDLCountryDestination.DataValueField = "mCRY_VCName";
        DDLCountryDestination.DataBind();

        DDLCountryDestination.Items.Insert(0, new ListItem(" --SELECT--", "0"));
        con.Close();


    }
    void ddlContainer()
    {
        con.Open();
        cmd = new SqlCommand("select Distinct(mCNT_VCTypeName) from TB_TransContainerType", con);
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataSet ds = new DataSet();
        da.Fill(ds);
        DDLContainer.DataSource = ds;
        DDLContainer.DataSourceID = String.Empty;
        DDLContainer.DataTextField = "mCNT_VCTypeName";
        DDLContainer.DataValueField = "mCNT_VCTypeName";
        DDLContainer.DataBind();

        DDLContainer.Items.Insert(0, new ListItem(" --SELECT--", "0"));


        con.Close();


    }

任何人都可以帮助我实现这一目标。

Can any one please help me to achieve this.

推荐答案

试试这个：

Try this:

public void ResetControl()
        {
  DDLContainer.Items.Insert(00, "Select");
  DDLCountryLoading.Items.Insert(00, "Select");
  DDLCountryDestination.Items.Insert(00, "Select");

            DDLContainer.SelectedIndex = 0;
            DDLCountryLoading.SelectedIndex = 0;
            DDLCountryDestination.SelectedIndex = 0;
           ImageMode.ImageUrl = "~/ShowImageMode.ashx?Mode=A";
        }

嗨


我刚刚调用了DDL函数。它可以像我想要的那样工作。



这是我的工作代码

Hi
I just Called the DDL functions.It works as what i want.

Here is my working code

public void ResetControl()
        {
            DDLContainer.Items.Clear();
            DDLCountryLoading.Items.Clear();
            DDLCountryDestination.Items.Clear();
            mobjGenlib.PopulateCountry(DDLCountryDestination);
            mobjGenlib.PopulateCountry(DDLCountryLoading);
            mobjGenlib.PopulateContainerType(DDLContainer);
           ImageMode.ImageUrl = "~/ShowImageMode.ashx?Mode=A";
        }

感谢所有帮助过我的人。

Thanks for all Who helped me.

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